Why Is My Basil Dying? 15 Common Causes and How to Save It

By Jagdish Reddy | 10+ Years Gardening Experience
Researched Using: University of Minnesota Extension: Basil Downy Mildew • Utah State University Extension: Basil in the Garden • University of Illinois Extension: Growing Basil in Your Backyard
Updated: July 2026

Why is my basil dying is one of the most common questions home gardeners search, and the answer usually comes down to water, light, or soil. Sweet basil (Ocimum basilicum), including Genovese, Thai, and lemon basil, reacts fast to stress and can go from thriving to collapsed within days.

This guide covers all 15 causes, a dedicated root rot breakdown, grocery store basil, repotting, container mistakes, basil varieties by zone, and climate notes for Texas, Florida, Arizona, and the Midwest.

Quick Answer: Most Common Cause: overwatering and root rot. Most Dangerous Disease: basil downy mildew. Fastest Fix: water by soil dryness, not a schedule. Do Not Do This: keep watering a wilting plant before checking the roots, since root rot wilting looks identical to thirst.

Diagnose Your Basil in 60 Seconds

Match your symptom to the table below. A plant that is both yellowing and sitting in wet soil is telling you two things at once, and treating only one usually leaves the problem half solved.

What You See	Likely Cause	Section
Yellow leaves	Overwatering or nitrogen shortage	Root Rot or Cause 8
Wilting, leaves limp	Underwatering or root rot	Root Rot or Cause 2
Brown, crispy leaves	Heat scorch or underwatering	Cause 2 or 5
Basil turning black	Frost damage or stem rot	Cause 6 or Root Rot
White fuzz or powder	Powdery or downy mildew	Disease section
Basil leaves falling off	Transplant shock or root stress	Grocery Basil section
Holes in leaves	Pests feeding at night	Cause 11
Basil leggy, few leaves	Low light	Cause 4
Basil flowering early	Heat or long daylight hours	Cause 15
Sudden overnight collapse	Frost or severe root rot	Root Rot or Cause 6

How to Tell if Your Basil Plant Is Dying

The stem is the best indicator, since leaves react to stress faster than the plant’s actual survival odds do.

Stage	What You Notice	Outlook
Early warning	A few yellow lower leaves, slight afternoon droop	Fully recoverable
Can still recover	Wilting but the stem stays firm and green when scratched	Recoverable with a fix
Cannot be saved	Black, mushy stem base and a sour smell from the soil	Start a new plant

Scratch the stem near the soil line. Green underneath means the plant is still alive. Brown or black means that section is already dead.

Five Things Experienced Gardeners Check First

1. Roots, the most common cause of yellowing and wilting.
2. Stem color at the base.
3. Leaf undersides, where pests and mildew start.
4. Newest leaves, for nutrient and light clues.
5. Soil smell, a sour odor means root rot.

Healthy Basil vs Unhealthy Basil

Healthy	Unhealthy
Firm stem	Mushy stem
White or tan roots	Black or brown roots
Dark green leaves	Pale or yellow leaves
Compact, bushy growth	Leggy, stretched growth

Basil Symptoms and What They Mean

Symptom	Likely Cause	Urgency	Best Fix
Yellow leaves, soggy soil	Overwatering	High	Let soil dry, check roots
Crispy, curled leaves	Underwatering	Medium	Deep water immediately
Basil stem turning brown or black	Root or stem rot	Critical	Trim, repot, or take cuttings
Pale green, small leaves	Low nitrogen	Medium	Feed with balanced fertilizer
Grey fuzz under leaves	Downy mildew	Critical	Remove plant, improve airflow
Basil plant not growing	Rootbound or cold soil	Medium	Check roots, repot if needed

Yellow Leaf Diagnosis Flowchart

The following image flow chart explains you the exact reasons of yellowing basil leaves.

Decision tree, basil wilted overnight: Plant wilted overnight > check soil moisture > dry > water deeply, recheck in two hours > still wilted > inspect roots > brown and soft > this is root rot, not thirst > trim damaged roots and repot in dry mix.

Basil Root Rot: Identification, Recovery, and Prevention

Waterlogged soil deprives basil roots of oxygen, causing them to die and rot. Leaves often turn yellow before any root damage is visible, which is why root rot gets misdiagnosed as a nutrient problem so often.

GardenTruth Tip: If a basil plant wilts but the soil is already wet, do not water again. Check the roots first. Most thirsty-looking basil in containers is actually poor drainage or early root rot, not lack of water.

How to Identify Basil Root Rot

Ease the plant out of its pot and rinse the roots. Healthy roots are white or tan and hold together. Rotting roots turn brown or black, feel mushy, and often carry a sour, swampy smell.

Root Rot vs Underwatering

Feature	Root Rot	Underwatering
Soil feel	Wet or soggy	Dry, pulls from pot edges
Leaf texture	Yellow, soft, limp	Brown, crispy, curled
Smell	Sour or swampy	None
After watering	No improvement	Perks up within hours

Can Basil Recover from Root Rot?

Yes, if at least a third of the roots are still firm and white. Trim every brown or black root, repot into fresh dry mix, and hold off watering for two to three days. If almost nothing white remains, cuttings from a healthy upper stem are faster than nursing the roots back.

Root Rot Prevention Checklist

• Use pots with drainage holes every time.
• Check soil moisture before watering on a schedule.
• Mix perlite or coarse sand into heavy potting soil.
• Empty saucers so roots never sit in standing water.
• Repot yearly so old soil does not hold excess moisture.

Why Is My Basil Dying? 15 Common Causes and Solutions

1. Overwatering and Root Rot

Covered in full in the Root Rot section above. Check the roots first before trying anything else.

2. Underwatering

Basil loses water quickly through its broad leaves, so dry soil causes drooping within a day.

Symptoms: midday droop, crispy edges, soil pulling from the pot wall.
Fix: water deeply until it drains from the bottom, then recheck in two hours. Most underwatered basil straightens back up in that window.

3. Poor Drainage

Correct watering still fails if water has nowhere to go. Test it: water the plant, wait ten minutes, and check whether anything drains out the bottom. If not, clay soil or a hole-free pot is trapping moisture at the roots.

Fix: mix in perlite, vermiculite, or coarse sand, and switch containers to a well-draining mix. The soil volume calculator works out exactly how much new mix you need.

4. Not Enough Sunlight

Most sweet basil grows best with six to eight hours of direct sun, though gardeners in very hot climates often see better summer results with morning sun and light afternoon shade. A leggy plant with long gaps between leaves is asking for more light.

Fix: move to a south-facing window or the sunniest yard spot. Indoors, a grow light for 12 to 14 hours daily replaces what a window alone cannot provide.

5. Excessive Heat or Sun Scorch

Once temperatures pass 95°F with intense afternoon sun, leaf edges can scorch even with damp soil, since the plant loses water faster than roots can replace it.

Fix: add afternoon shade during heat waves and water in the morning so roots hold a reserve.

6. Cold Temperatures and Frost Damage

As a tropical herb, basil stresses below 50°F, and a single frost can blacken every leaf overnight as ice ruptures the leaf cells.

Fix: bring containers in before nights drop below 50°F. Blackened leaves will not recover, but new growth can emerge if the lower stem stayed firm.

7. Incorrect Watering Schedule

Watering by the calendar instead of the soil is a common habit, and basil’s real water needs shift with heat, humidity, and pot size.

Fix: run a daily finger test and water only when the top inch feels dry.

8. Nutrient Deficiency

A basil plant left unfed for months exhausts available nitrogen, and new leaves come in smaller and paler, with older leaves yellowing first.

Fix: feed every three to four weeks during active growth with a balanced liquid fertilizer at half strength.

9. Overfertilizing

A quick way to check: look for crusty white residue on the soil surface. Extra fertilizer raises salt concentration, pulling moisture from roots and browning leaf margins even in moist soil.

Fix: flush the pot with plain water until it runs freely, then cut feeding frequency in half.

10. Rootbound Plants

A basil plant that has filled its pot with roots dries out within a day of watering and stalls in growth regardless of care.

Fix: tip the plant out. If roots circle the bottom, move up to a container at least two inches wider. The raised bed soil calculator and plant spacing calculator help size the container and spacing.

11. Common Basil Pests

Check leaf undersides first, since most feeding and egg-laying happens there.

• Aphids: tiny green clusters, sticky residue. Insecticidal soap, neem oil, or beneficial insects like ladybugs.
• Spider mites: fine webbing, speckled leaves. Raise humidity, rinse leaves regularly.
• Whiteflies: small white insects that scatter. Yellow sticky traps, horticultural oil, or floating row covers.
• Japanese beetles: skeletonized leaves. Hand-pick in early morning.
• Slugs and snails: ragged holes, slime trails. Copper tape, clear damp hiding spots.

12. Fungal Diseases

Several fungal problems affect basil beyond the two most common ones. Damping off topples young seedlings at the soil line within days of sprouting.

• Fusarium wilt (Fusarium oxysporum f. sp. basilici): one-sided wilting, streaked black stems. Not reversible; discard plant and soil.
• Powdery mildew: white powder on leaves. Space plants wider, improve airflow.
• Damping off: seedlings collapse at the soil line. Use sterile mix, avoid overwatering seedlings.
• Botrytis (grey mold): fuzzy grey mold in cool, damp air. Remove affected tissue, reduce humidity.
• Cercospora leaf spot: brown spots with yellow halos. Remove leaves, avoid overhead watering.
• Alternaria leaf spot: dark, ringed spots. Improve airflow, clear debris.

Where fungal pressure is heavy, a copper fungicide or biofungicide applied preventively can help, though fixing airflow and watering usually matters more.

13. Bacterial Leaf Spot and Bacterial Soft Rot

Small, dark, water-soaked spots that spread in wet, humid weather point to bacteria rather than fungus. Soft rot goes further, turning stems slimy after a wound lets bacteria in.

Fix: remove affected leaves, water at the soil line, and avoid handling wet foliage.

14. Downy Mildew

Downy mildew (Peronospora belbahrii) is the most destructive basil disease in the US, first identified in Florida in 2007 and now widespread, including recent outbreaks across Texas, Ohio, and the broader Midwest and Southeast. Yellow patches appear on top of leaves, with grey fuzz underneath a few days later, and infected plants rarely recover.

Fix: remove infected plants immediately, space remaining plants wider, and choose a variety bred for improved resistance, such as Prospera or Amazel, keeping in mind that no variety is fully immune. The University of Minnesota Extension guide on basil downy mildew has detailed photos.

Downy Mildew vs Powdery Mildew

Feature	Downy Mildew	Powdery Mildew
Top of leaf	Yellow angular patches	White powdery coating
Underside of leaf	Grey or purple fuzz	Little to no fuzz
Conditions	Cool, humid, poor airflow	Warm days, cool nights
Outlook	Usually fatal	Manageable with airflow fixes

15. Early Flowering (Bolting)

A basil plant that flowers early redirects energy into seed production, stops pushing new leaves, and often turns bitter. Heat and long daylight hours trigger it.

Fix: pinch off flower buds as soon as you see them and harvest the top leaves weekly.

Top 10 Mistakes That Kill Basil

1. Watering on a fixed schedule instead of checking the soil.
2. Using a pot with no drainage hole.
3. Keeping basil in less than six hours of direct sun.
4. Leaving grocery store basil in its original crowded pot.
5. Watering the leaves instead of the soil.
6. Skipping the root check when a plant wilts.
7. Overfertilizing to try to force faster growth.
8. Letting the plant flower without pinching it back.
9. Reusing old, compacted potting soil at repotting time.
10. Bringing basil outdoors too early before the last frost.

Why Does Grocery Store Basil Die So Quickly?

Grocery store basil is grown as a dense cluster of seedlings crammed into one small pot, which looks lush but is essentially rootbound from day one. Greenhouse-grown plants also struggle to adjust indoors, which is why basil leaves falling off within the first few days at home is so common.

How to Separate Grocery Store Basil

Remove the whole root ball and gently tease it apart in a bowl of water. Separate into clumps of two to three stems rather than isolating every seedling, since forcing them apart one by one causes more damage than it prevents.

Repot each clump into fresh, well-draining soil. Expect a few days of wilting as the disturbed roots recover, which is normal transplant stress, not failure.

Why Is My Basil Dying After Repotting or Transplanting?

Transplant shock happens when roots are disturbed faster than the plant can adjust, and basil’s fine root hairs break easily during handling.

Fix: keep the plant out of direct sun for two to three days, water gently to settle the soil, and skip fertilizer until new growth appears. Most transplant shock resolves in three to seven days.

How Often Should Basil Be Repotted?

Once a year, or sooner if roots circle the drainage holes or the plant dries out within a day of watering.

Repotting Checklist

• Choose a pot two inches wider than the current one.
• Use fresh potting mix, not reused soil.
• Water lightly after repotting, then hold off for two days.
• Keep out of direct sun for the first few days.

Container Basil: Pots, Drainage, and Common Mistakes

Factor	Terracotta	Plastic
Drying speed	Faster, porous walls	Slower, holds moisture
Best for	Gardeners prone to overwatering	Hot, dry climates
Weight	Heavier, more stable	Lightweight, easy to move

Pot color matters too for container basil. Black plastic absorbs heat in direct sun and can overheat roots on hot afternoons in Arizona or inland California, so lighter containers are safer for outdoor summer growing.

Which Basil Variety Is Easiest to Grow?

Variety	Heat Tolerance	Disease Resistance	Cold Tolerance
Sweet basil	Moderate	Low	Low
Genovese	Moderate	Low	Low
Thai basil	High	Moderate	Low
Lemon basil	Moderate	Low	Low
Prospera or Amazel	High	Improved downy mildew resistance, not immune	Low

Holy basil (tulsi) is a related but different species, grown more for tea than cooking, and handles heat better than Genovese types.

Growing Basil from Seed or Cuttings

Seed gives the widest variety choice but takes longer to reach harvest size than a nursery plant or cutting.

Can You Save Basil by Taking Cuttings?

Yes, if fusarium wilt is not involved and the upper stem is still green and firm. Cut a four to six inch section above a leaf node, strip the lower leaves, and root it in water for one to two weeks. Utah State University Extension confirms the same technique, cutting just above a leaf node to encourage branching. Take several cuttings to improve your odds, and change the water every two to three days.

Harvesting and Pinching Basil Correctly

Basil that is never harvested grows leggy and flowers early. Cut just above a leaf node, not mid-stem, harvesting from the top down to keep the plant bushy.

Basil Lifespan: When to Replace the Plant

Outdoors, basil behaves as an annual and dies with the first frost regardless of care. Indoors or in zones 10 and above, a plant can produce for six months to over a year before it turns woody and declines.

Basil Companion Plants

Good Companions	Why It Works	Avoid Nearby
Tomatoes	Similar water and sun needs, may help repel some pests	Rue
Peppers	Same sun, soil, and watering requirements	Sage
Marigolds	Attract pollinators, may reduce aphids	Fennel

Tomatoes and basil sharing a bed is a long-standing, low-risk pairing.

Common Watering Mistakes That Kill Basil

Mistake	Why It Hurts	Fix
Watering every day	Suffocates roots	Check soil first, water as needed
Watering at night	Leaves stay wet, invites fungus	Water in the morning
Soil constantly wet	Causes root rot	Let top inch dry between waterings
Pots without drainage	Traps excess water	Drill holes or repot
Wetting the leaves	Spreads fungal disease	Water at the soil line
Watering too shallowly	Roots stay near the surface	Water until it drains fully

Rainwater is naturally free of added chlorine and often softer than tap water. Many gardeners use it successfully for basil, though plant health depends far more on drainage, sunlight, and watering habits than on the water source itself.

Best Soil Mix for Healthy Basil: pH, Drainage, and Organic Matter

Basil grows best in loose, well-draining soil with a pH between 6.0 and 7.0. A potting mix blended with perlite or vermiculite gives roots air pockets, while peat moss or coco coir holds just enough moisture.

Work two to three inches of compost into garden beds each season, using the compost calculator to size the amount. Refresh container soil yearly rather than reusing it. The soil volume calculator and mulch calculator help plan new beds and mulch depth. General basil growing requirements are also outlined by University of Illinois Extension.

Indoor vs Outdoor Basil

Indoor basil: relies on a window or grow light, struggles most from low light and dry air, but can grow year-round.
Outdoor basil: gets free direct sun, but faces heat, wind, and pests, and its season ends at first frost.

Why Is My Indoor Basil Dying? Common Problems and Fixes

Indoor basil struggles mainly because light through glass is far weaker than direct sun, and indoor air tends to be drier or more stagnant. Stretching stems and pale color point to low light; crisp brown edges despite moist soil point to dry indoor air or a nearby heat vent.

Indoor Basil Checklist

• At least 6 hours of bright light or a grow light on a timer.
• Soil checked daily during the first two weeks in a new spot.
• Pot kept away from radiators, vents, and drafty windows.

Why Is My Outdoor Basil Dying? Weather, Pests, and Soil Problems

Wilting only in the hottest afternoon hours points to heat stress rather than dry soil. Water pooling after rain signals a drainage fix is needed, and stems leaning after wind call for staking. Ragged overnight holes usually mean slugs or beetles, while sticky residue points to aphids.

Outdoor Basil Checklist

• Beds or containers with visible drainage, never standing water after rain.
• Mulch layer of 2 inches to buffer soil temperature swings.
• Weekly pest check on leaf undersides.
• Row cover ready for sudden cold nights.

How Climate Affects Basil Growth Across the United States

Regional climate changes which basil problem shows up first. In Florida and humid East Texas, downy mildew and bacterial leaf spot are the constant pressure, so wide spacing and soil-line watering matter most. Arizona and West Texas bring intense dry heat that scorches leaves fast and raises water needs sharply, especially in containers on hot pavement. The Midwest, including Michigan and Ohio, deals with a short season and frost risk on both ends, plus recurring downy mildew once humid summer stretches arrive.

Climate	Main Risk	Fix
Florida, humid Texas	Fungal and bacterial disease	Space plants, water at soil line
Arizona, dry Texas	Underwatering, scorch	Mulch, water deeply and often
Midwest (Michigan, Ohio)	Frost on both ends, mid-summer mildew	Time planting to frost dates, space plants

How to Protect Basil During Heat Waves, Heavy Rain, and Early Frost

• Heat waves: shade cloth and morning watering.
• Heavy rain: raised beds or containers with strong drainage.
• High humidity: space plants wider, water at the base.
• Strong winds: stake plants or use a windbreak.
• Early frost: cover plants or bring containers in near 50°F.

Basil Growing Conditions by USDA Hardiness Zone

USDA zone shapes planting timing, watering frequency, and disease pressure. Colder zones (3 to 7), common across Michigan, Ohio, and the Northeast, mean a shorter season and frost risk on both ends, so seeds start indoors and fast-maturing varieties work best. Warmer zones (8 to 9), common across Texas and the Southeast, bring long, hot summers where bolting and scorch are the main risks. Tropical zones (10 to 13), including South Florida and coastal Southern California, allow near year-round growth but raise disease pressure, especially where humidity stays high. Overwintering indoors works in any zone with a grow light; outdoor overwintering only works in zones 10 and above.

Best Basil Varieties by Zone

• Zones 3 to 5: Genovese and sweet basil, for faster maturity.
• Zones 6 to 7: Genovese, sweet basil, and lemon basil.
• Zones 8 to 9: Thai basil and Prospera, for heat and bolting resistance.
• Zones 10 to 13: Prospera and Amazel, for downy mildew pressure.

USDA Zone	Growing Season	Main Challenge
3 to 5	Short, frost risk both ends	Frost damage
6 to 7	Moderate, plant after last frost	Cool spring soil
8 to 9	Long, hot summers	Heat and bolting
10 to 11	Nearly year-round	Humidity and disease
12 to 13	Year-round, tropical	Fungal pressure

Best Time to Plant Basil by USDA Zone

USDA Zone	Plant Outdoors	Harvest Period	Frost Risk
3 to 5	Late May to early June	June through September	High
6 to 7	Mid to late May	June through October	Moderate
8 to 9	April	May through November	Low
10 to 11	Year-round	Nearly year-round	Very low

For exact dates by state, use the USA Planting Calendar, or the Garden Planner Tool to lay out a full bed around it.

Seasonal Basil Care Guide

Season	Key Task
Spring	Plant after last frost, start light feeding
Summer	Water deeply, pinch flowers, watch for pests
Fall	Harvest heavily before first frost
Winter	Move indoors or grow under a light, or take cuttings first

Basil Leaf Problems at a Glance

Leaf Sign	Most Likely Meaning
Yellow leaves	Overwatering or nitrogen shortage
Brown edges	Underwatering or fertilizer burn
Brown spots	Fungal or bacterial infection
Basil turning black	Cold damage or stem rot
Purple leaves	Phosphorus deficiency or cold stress
Curling leaves	Heat stress or aphid feeding
White spots or powder	Powdery mildew
Holes in leaves	Chewing pests like beetles or slugs
Basil leaves soft or limp	Root rot or heat stress

See also pepper leaves turning yellow and holes in plant leaves for similar symptom breakdowns, or the Plant Diagnosis Tool to narrow down a specific combination.

Is It a Pest, Disease, or Watering Problem?

Symptom	Pest	Disease	Watering
Yellow leaves	Rare	Downy mildew	Overwatering
Holes in leaves	Beetles, slugs	Rare	No
Wilting	Root-feeding pests	Root rot	Under or over
White coating	No	Powdery mildew	No

Nitrogen Deficiency vs Overwatering

Nitrogen deficiency starts on older, lower leaves and develops slowly, even with normal soil moisture. Overwatering yellows leaves all over the plant at once, with a sudden droop and wet or soggy soil.

Heat Stress vs Drought Stress

Heat stress wilts leaves in afternoon sun with moist soil, recovering by evening; afternoon shade fixes it. Drought stress stays wilted regardless of time of day, with crispy edges, and only recovers after deep watering.

How Long Does Basil Take to Recover?

Setback	Typical Recovery Time
Underwatering	Hours to 1 day
Overwatering, caught early	1 to 2 weeks
Transplant shock	3 to 7 days
Pest treatment	1 to 2 weeks
Disease treatment	2 to 4 weeks, if it survives
Frost damage	New growth in 1 to 3 weeks if stem survived

Basil Care Checklist

Frequency	Tasks
Daily	Check for wilting, inspect leaves, check soil moisture
Weekly	Look for pests, remove damaged leaves, harvest regularly
Monthly	Fertilize if needed, check roots, refresh mulch
Seasonal	Watch weather forecasts, adjust watering, prep for frost or heat

Frequently Asked Questions

Can basil recover after overwatering?

Yes, if caught early. Stop watering, move to bright indirect light, and check the roots. Firm white roots point to recovery within one to two weeks.

Can basil recover from root rot?

Only if a meaningful portion of roots are still firm and white. Trim the rotted sections, repot in dry mix, and hold off watering. If nearly all roots are brown, cuttings from the healthy stem are usually faster.

Why is my basil dying after transplanting?

This is usually transplant shock rather than a deeper problem. Basil’s fine root hairs break easily during handling, so expect some drooping for three to seven days before new growth confirms recovery.

Why is my basil wilting even after watering?

Usually root rot rather than dry soil. Damaged roots cannot absorb water, so check root color before adding more.

Should yellow leaves be removed?

Yes. They will not turn green again, and removing them lets the plant focus energy on new growth.

Why are my basil leaves turning brown?

Crispy edges usually mean underwatering or heat scorch; soft brown spots point to fungal or bacterial disease.

Why is my basil stem black?

Either frost damage or stem rot. Frost stays localized to exposed tissue, while rot spreads upward from the soil line and feels soft.

How do I know if basil has root rot?

Check the roots directly. Brown or black, mushy roots with a sour smell confirm root rot rather than a light or nutrient issue.

Can basil be overwatered even in well-draining soil?

Yes, if watered daily regardless of dryness. Good drainage reduces the risk but roots still need air between waterings.

Does basil come back every year?

It is grown as an annual across most of the US and dies with the first frost. In zones 10 and above, it can persist as a short-lived perennial.

Can basil survive winter outside?

Only in zones 10 and above, where nights reliably stay above 50°F. Elsewhere it needs to come indoors or be replaced in spring.

Can basil recover after frost?

Blackened leaves will not green back up, but new growth can emerge within one to three weeks if the lower stem stayed firm.

Can basil grow indoors year-round?

Yes, with 12 to 14 hours of strong light daily and airflow to prevent fungal issues in still indoor air.

Should basil be misted?

Not recommended, since damp foliage raises fungal disease risk. Water at the soil line instead.

How often should I water basil?

When the top inch of soil feels dry, typically every two to three days in containers and once or twice weekly in the ground.

How long does basil live?

One growing season outdoors as an annual. Indoors or in zones 10 and above, six months to over a year before natural decline.

Final Thoughts

Most basil problems trace back to water that does not match the soil’s actual dryness, not enough direct light, or drainage that cannot keep up. Fix those first, and most plants bounce back within two weeks.

Check the roots before assuming the worst, separate grocery store basil the day it comes home, and remember basil grown outdoors as an annual will naturally decline at season’s end regardless of care.

Disclaimer: Information on this site is for educational purposes only. Results vary by climate, soil, weather, and growing conditions. For region-specific advice, consult your local USDA Cooperative Extension Service before making major gardening or soil changes.