How to Grow Basil in a Small Garden
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How to grow basil in a small garden comes down to four things: direct sun, enough room between plants, steady moisture, and regular picking that keeps the plant leafy. The extension pages we opened agree on most of this. They differ on whether to pinch off flower buds and on how long basil keeps in the refrigerator, and this guide shows both sides rather than picking one.
Quick answer
- Give basil full sun. The Arizona Cooperative Extension sheet says it grows best where it gets at least 6 to 8 hours of direct sun per day.
- Leave room between plants. The sources give final spacings from 6 to 12 inches, and Utah State University sets its final stand at 12 inches.
- Water regularly. Utah State gives a target of about 1.5 inches per week, and containers need checking more often because they dry out faster.
- Pick the leaves regularly. Utah State says regular leaf removal before flowers form encourages more leaves and branches.
Start with sun and soil
The sun question is the simplest one, and the sources agree on it. Illinois Extension says, “Basil prefers a sunny location, and a soil that is well supplied with organic matter and is fertile.” The Arizona sheet puts a number on it, saying basil grows best where it receives “at least 6 to 8 hours of direct sun per day.” Utah State adds a reason to pick the brightest spot: “Basil grown in full sun has more essential oils and better flavor than shade grown basil.” A corner that gets only part of the day will not meet that standard, so check the sun before you commit the space.
Soil follows the same logic. Utah State describes basil as preferring “fertile, well-drained loamy soils rich in organic matter.” Illinois describes the opposite case: “Poorly prepared soils that are low in nutrients result in slow growing basil that is not very flavorful.” Utah State also suggests a soil test before any fertilizer goes in.
Feeding is a light touch. Arizona says to “Fertilize sparingly”, and it notes that extra fertilizer may not be needed where compost was already worked into the soil. Utah State says that “Basil requires some additional nitrogen to sustain rapid leaf growth”, and it suggests sidedressing with liquid fertilizer every 14 days to keep leaves coming. Arizona links weak plants with yellowing older leaves to a possible nitrogen shortage.
Sow or transplant at the right time
Basil is sensitive to cold, so timing matters. Illinois Extension says that seeds “germinate and grow best when the media temperature is at least 70 degrees”, and that cold soil and cold air can stunt the plant. Utah State advises planting seeds or transplants “after the last frost of the season.” Its seed depth is 1/8 inch, and it gives 10 to 14 days to sprout, while the Arizona sheet expects germination within about 5 to 7 days. The pages do not explain the difference.
Transplants are the faster route. Utah State says transplants take 4 to 6 weeks to grow to size. Illinois suggests growing transplants indoors for about 3 to 4 weeks, then setting them out once soil temperatures are warm enough.
Plan the spacing in a small bed
Spacing decides how much basil a small bed can carry, and the sources give close but different figures. Arizona says to thin or transplant young plants “to have a final spacing of 6 to 12 inches apart.” The Kentucky Department of Agriculture herb sheet gives 9 to 12 inches between plants and a mature height of 12 to 18 inches. Utah State describes a longer thinning sequence, and it ends with “Continue to thin the seedlings until the final plant stand is 12 inches apart.”
Utah State starts thinning early, to 3 to 4 inches apart after the seedlings emerge, and then keeps thinning toward the final spacing. The same page notes that thinned plants can be transplanted to adjacent areas, so a thinned seedling can fill a gap in the bed.
The sources do not give a plant count for a bed of a given size, so the row arithmetic here is ours and not a source figure. Divide the row length by the spacing you choose. A 36-inch row at 12-inch spacing gives three plants, and the same row at 9 inches gives about four. Choosing the wider end of the range also leaves more room for air to move between plants.
Airflow is the reason to avoid crowding. Utah State says to “Keep the plants spaced far enough apart for adequate air circulation to keep plants dry.” It also advises choosing “sites that have good air circulation around the plants.” For the bed itself, see our guide to vegetables to plant in raised beds and our post on how much soil a raised bed garden needs.
Use pots when the bed is full
A pot can solve a small garden problem when the bed has no room left. Utah State says that “Growing plants in pots on the patio is a good method to save space and get high productions.” The trade-off is water. The Arizona sheet notes that container-grown plants “will dry out faster than those in garden beds.” The same sheet says that “Pots should have a drainage hole” and a well-drained potting mix.
Water steadily and mulch the bed
Basil needs steady moisture. Illinois says that basil “also likes to be kept well-watered.” Utah State gives a target of about 1.5 inches of water per week to keep growth vigorous, and it warns that irrigation “will prevent wilting that slows growth, damages roots, and stunts plants.”
The Arizona sheet asks growers to “keep well irrigated” until summer rains begin, so the roots keep receiving moisture. Heat adds pressure. Utah State says that high summer temperature and water stress “causes basil to flower and set seed”, and that “Off flavors develop and plants stop leaf production.”
Mulch matters most for weeds. Utah State says that “Organic mulches such as grass clippings, straw and newspapers can help control weeds.” It adds that “Basil does not compete well with weeds so control during seedling establishment is critical.” In a small bed, that means clearing weeds while the seedlings are small, then mulching once the plants are settled.
Pinch, harvest and deal with flowers
Pinching is how most small-garden basil stays bushy. Illinois says that “Pinching the tips of stems encourages a bushy plant and more leaf growth resulting in a round plant full of aromatic basil.” Utah State says that “Regular leaf removal before flowers form will force the plant to grow more leaves and branches.” Its harvest rule is to wait until the plant has 6 to 8 leaves, then cut enough stem to leave 2 to 4 leaves on the plant.
Arizona gives a height rule instead of a leaf count. It advises to “Begin harvesting basil after plants reach at least 6 to 8 inches in height.” When whole stems are cut, the sheet says to cut just above a pair of leaves, and new growth comes from the leaf axils below the cut.
Flowers are where the sources part ways. Illinois says that “Basil flower buds should be removed by pinching as soon as you see them form.” Arizona agrees, saying to “Watch for flowers to form and simply pinch them off the plant.” Utah State disagrees on the effect. Its FAQ says that “Pinching off the flowers as they form does not stimulate new foliage”, and that pinching “encourages flowers to form in the axils of the leaves thus reducing the yield of the plant.”
The sources do not settle this question. What they agree on is that leaves picked often keep the plant in leaf, and that flowering reduces the quality of the crop. Arizona puts the second point plainly: “Basil that is allowed to flower and form seed will stop growing and become somewhat bitter.” A reasonable reading is to pick leaves regularly, check for buds every few days, and treat pinching flowers as an option rather than a guaranteed fix.
Store, dry and freeze what you pick
Storage advice splits in the same way. Illinois says that “Basil picked for use in the kitchen is best held in a glass of water at room temperature”, and that “Putting basil in the refrigerator results in discolored and unattractive leaves.” Utah State says that “To store fresh basil, re-cut the stems and place in a jar of water away from direct sunlight.” It then gives a refrigerator method for longer storage: “For longer storage (7-10 days), cover the jar and stems with a plastic bag and put in the refrigerator.”
The two pages do not reconcile those instructions, so the choice is yours. Both agree on keeping the stems in water and out of direct sun.
Drying is the other route. Utah State says to “Tie the harvested stems and leaves into bunches, and hang them indoors or in a shady place to dry.” Leaves should dry in 5 to 10 days, and the page advises against drying in direct sun. Freezing is less useful for the leaves themselves. Utah State recommends freezing whole leaves in ice cubes to keep more of the flavor, and it adds that “Frozen basil should be used in 3-6 months.”
Start basil indoors in fall and winter
Illinois says that “Basil is easily grown as a window sill herb for fall, winter and early spring harvest.” Its method is to sow several seeds in a small pot, keep the mix moist, and place the pot in a full sun location, with harvest beginning “in about 4 to 5 weeks.” The page does not give a light level for indoor basil, so any lighting plan beyond a sunny window is outside what it states.
How we chose
The source list is short on purpose. We opened each candidate page with curl on 2026-10-23 and kept only pages that returned HTTP 200 and readable text. Four pages met that test: Illinois Extension, Utah State University Extension, the University of Arizona Cooperative Extension sheet, and the Kentucky Department of Agriculture herb fact sheet.
We kept only statements that a page makes in plain words, and we checked each quoted sentence against the text of the page it came from. Where two pages disagree, both versions appear in the text.
What we could not verify
The pages describe basil in general. They give no planting plan for a particular bed size and no yield for a single plant. The layout examples here are arithmetic on the stated spacings, and they are labelled that way.
What the sources do not say
None of the pages gives a height or spread for the compact varieties it names. Illinois calls Emily and Medinette compact but gives no size for either. Kentucky gives a height for basil as a group, not for each cultivar. The sources also disagree on flower pinching and refrigerator storage, and they do not settle either question.
Frequently asked questions
How much sun does basil need in a small garden?
The Arizona Cooperative Extension sheet says basil grows best where it gets at least 6 to 8 hours of direct sun per day. Utah State adds that full sun gives more essential oils and better flavor than shade.
How far apart should basil plants be?
The pages give a final spacing of 6 to 12 inches (Arizona), 9 to 12 inches (Kentucky), and 12 inches (Utah State). A bed set at 12 inches leaves the most room for airflow.
Should I pinch off basil flowers?
Illinois and Arizona both say to pinch off flower buds as they form. Utah State says pinching off flowers does not stimulate new foliage, so the sources do not agree on what it gains. Regular leaf harvest is the one practice all three pages support.
How often should basil be watered?
Utah State gives a target of about 1.5 inches of water per week. Arizona says to keep plants well irrigated until summer rains begin, and it notes that containers dry out faster than beds. The weekly figure is a starting point, not a fixed schedule.
Can I grow basil in a pot if my garden is full?
Yes, according to the sources. Utah State says pots on the patio save space and can give high productions, and Illinois calls basil excellent in patio or balcony containers. Pots need a drainage hole and a well-drained potting mix, and they will need water more often than a bed.
Sources
- https://extension.illinois.edu/herbs/basil (opened 2026-10-23)
- https://extension.usu.edu/yardandgarden/research/basil-in-the-garden.php (opened 2026-10-23)
- https://www.extension.arizona.edu/sites/default/files/2024-10/Basil.pdf (opened 2026-10-23)
- https://doa.gov.ky/wp-content/uploads/2022/08/Herb-Fact-Sheet.pdf (opened 2026-10-23)
