Most herbs fit neatly into a square foot grid once you match each one to its mature size.
Plant 1 large basil, oregano, sage or rosemary per square, 4 compact basil, parsley or thyme, 9 cilantro, and 9 to 16 chives, and keep mint out of the bed entirely. Put perennials on the edges and tall herbs on the north side, and a 4 x 4-foot bed will feed a busy kitchen from late spring into fall.
Getting those numbers right is what separates a tidy herb garden from a tangled one. Herb seed packets list row spacing for traditional gardens, so they won’t tell you how many plants to tuck into one square.
Once you know the per-square count, planning herbs in a square foot garden takes about ten minutes and a handful of plant labels.
Why Do Herbs Work in a Square-Foot Grid?
Herbs suit the grid because most of them stay small, get picked a little at a time, and stay productive in tight, rich soil. A few squares give you more fresh flavor than a whole shelf of grocery store clamshells.
How Does a 4-by-4-Foot Bed Organize Herbs?
Square foot gardening uses a raised bed, usually 4 x 4 feet, split into sixteen 1-foot squares with a visible grid on top. The method caught on in the early 1980s because it replaced long rows with small, easy blocks.
For herbs, each square becomes its own little plot. You can give basil one square, parsley another, and thyme a corner without anything blending together.
I’d stick a plant label in each square the day you plant. When seedlings are tiny, cilantro and parsley look alike, and labels save you from pulling the wrong one.
Keep 2 to 3 feet of path between beds. That lets you reach every square from the side without stepping on the soil.
What Makes Herbs a Good Use of Small Spaces?
Herbs give you a high return per square. One healthy parsley square can supply garnish and salads for months, and a thyme square lasts for years.
Herbs also love cut-and-come-again harvesting. You snip what you need, and the plant grows back. That fits the square-foot idea of steady harvests from a small footprint.
A packet of herb seeds costs a few dollars, so filling a few squares from seed is one of the cheapest ways to start a raised bed herb garden. Woody herbs like rosemary and sage are easier from nursery starts.
How Many of Each Herb Fit in One Square?
Herbs fall into three groups: big plants that take a whole square, medium plants at 4 per square, and slim plants at 9 to 16. Here’s the quick chart I’d keep handy.
| Herb | Plants per square | Life cycle |
|---|---|---|
| Large basil | 1 | Annual |
| Oregano | 1 | Perennial |
| Sage | 1 | Perennial |
| Rosemary | 1 | Tender perennial |
| Compact basil | 4 | Annual |
| Parsley | 4 | Biennial, grown as annual |
| Thyme | 4 | Perennial |
| Dill | 1 to 4 | Annual |
| Cilantro | 9 | Annual |
| Chives | 9 to 16 | Perennial |
One Plant: Large Basil, Oregano, Sage, and Rosemary
Big Genovese-type basil grows 2 feet tall and nearly as wide, so give it a full square. Plant it in the center of the square.
Oregano spreads into a low mound about 18 inches across. Sage grows into a shrubby clump, and rosemary keeps getting bigger every year it survives. One per square is the right call for all three.
Four Plants: Compact Basil, Parsley, and Thyme
Use your fingers to press a plus sign into the soil, then plant one herb in each quarter. That spaces plants about 6 inches apart.
Compact or dwarf basil stays under a foot tall, so four fit. Parsley grows upright and takes four comfortably if you keep cutting outer stems. Thyme stays low and woody, and four plants fill a square by the second summer.
Nine to Sixteen Plants: Cilantro and Chives
Cilantro has slim stems and gets cut young, so plant 9 per square in a 3 x 3 pattern, about 4 inches apart.
Chives grow in narrow clumps. Use 9 for bigger clumps or 16 for single starts. Dill sits in between: 1 if you want flower heads for pickles, 4 if you’ll cut leaves young.
How Do You Prepare a Raised Bed for Herbs?
Herbs need a sunny spot, at least 6 inches of loose mix, and a grid you can see. Set all three up before planting and the rest of the season goes smoothly.
Choose Sun, Bed Depth, and a Visible Grid
Pick a spot with at least 6 to 8 hours of direct sun. Mediterranean herbs like oregano, thyme and rosemary want the full amount, while cilantro and dill handle a little afternoon shade.
Most herbs grow fine in 6 inches of mix. I’d go to 8 or 12 inches if you plan on rosemary, sage, or dill, since their roots run deeper and deeper soil holds water longer in July.
Lay a grid of thin wood strips or string across the top. A visible grid keeps your square foot garden layout honest, so a spreading oregano can’t quietly take over its neighbor.
Mix Soil That Drains Without Drying Out Immediately
The classic blend is equal thirds by volume of blended compost, peat moss or coco coir, and coarse vermiculite. You can read more about the square foot gardening soil mix and how to blend it.
Compost feeds the plants. Peat moss or coir holds moisture. Coarse vermiculite keeps the mix fluffy and lets extra water drain away.
This mix never needs tilling. Skip regular garden soil in the bed, because it packs down and stays soggy, which rots thyme and rosemary roots.
Which Annual Herbs Should You Plant?
Basil, parsley, cilantro, dill and summer savory are the annual herbs I’d start with. They grow fast, give you something to cut within weeks, and leave squares open for fresh planting each spring.
Basil and Parsley for Regular Picking
Basil is the summer workhorse of culinary herbs. It hates cold, so plant it after nights stay above 50°F, usually late May in the Northeast and Midwest and April in the Southeast.
My full notes on basil in a square foot garden cover varieties and pinching.
Parsley is technically a biennial, but I treat it as an annual because it bolts in its second spring. Set plants out a few weeks before your last frost, since it handles cool weather well.
See parsley in a square foot garden for seed-starting tips, since old parsley seed sprouts slowly.
Put these two near the front edge you reach most often. You’ll pick them several times a week.
Cilantro, Dill, and Summer Savory for Seasonal Harvests
Cilantro bolts once hot weather arrives. Sow a few pinches every 3 weeks in spring, then again in late summer for a fall crop. In the Southwest and Gulf Coast, cilantro grows best from fall through early spring.
Dill grows 3 feet tall, so it belongs on the north side. Sow it near your last frost date if you want heads for pickling with cucumbers.
Summer savory stays about a foot tall and fits 4 per square. Its peppery leaves go well with green beans.
Where Should Perennial Herbs Go?
Perennial herbs belong on the outer squares and corners, where they can stay for years without blocking you from replanting annual squares.
Keep Oregano, Thyme, Sage, and Chives at the Edges
Oregano, thyme and sage come from dry, gravelly hillsides. Edge squares drain faster and get more air, which suits them well. My guide to oregano in a square foot garden explains how to trim it so it stays in its square.
Chives are hardy almost everywhere in the continental US and come back early each spring. A corner square works well for them.
Trim spreading stems back to the grid line each spring. Thyme and oregano creep slowly, and a quick cut keeps them honest.
Give Rosemary Room and Plan for Your Winter Climate
Rosemary survives winter outdoors in roughly USDA Zones 7 to 10, and in the colder end of that range a hard winter still kills it. In Zones 6 and colder, I’d grow it in a pot you bring indoors before the first hard freeze.
In the Southeast, California and the Southwest, rosemary turns into a shrub 3 feet wide or more. Plan to move it out of the bed after a couple of years, or give it a corner with an empty path beside it.
Sage holds up to winter through about Zone 5. Keep it on the drier side in fall so its roots don’t sit wet through the cold months.
Which Herbs Need a Pot or More Space?
Mint should live in a container, and fennel, rosemary and dill need extra planning so they don’t take over the squares beside them.
Why Mint Belongs in Its Own Container
Mint spreads by underground runners that slide under the grid strips within one season. Once it’s in the mix, it’s hard to dig out completely.
Grow it in a 3- to 5-gallon pot next to the bed. If you want it in the bed, sink a bottomless pot into the soil with the rim sticking up an inch to stop surface runners.
When Fennel, Rosemary, or Dill Will Crowd Neighboring Squares
Fennel grows 4 to 5 feet tall and slows the growth of many plants near it. I’d give it a separate pot or a bed of its own.
Rosemary’s woody branches spread over the grid by the second year. Dill flops onto neighbors once it flowers, so stake it or plant it where a lean won’t shade anything.
Dill and cilantro also cross-pollinate, so keep them a few squares apart if you save seed.