A small herb garden needs just four things: a pot with drainage holes, well-draining soil, six hours of sun, and herbs you’ll actually use.
Starting a small herb garden is one of the quickest wins in gardening. You can grow basil, parsley, and mint on a balcony, patio, or sunny windowsill with surprisingly little effort. The difference between thriving herbs and a pot of regret comes down to a few basics: drainage, light, and knowing which herbs to plant together.
What Herbs Should You Plant First?
Pick herbs you will actually cook with. Beginner-friendly culinary options include basil, parsley, mint, coriander/cilantro, rosemary, thyme, and chives. These grow readily in containers and tolerate the occasional missed watering.
One important rule: grow mint on its own. BBC Good Food notes that mint spreads aggressively and will crowd out other herbs in a shared pot. Give it its own container and both the mint and your other herbs will thrive.
The Right Pot, Soil, and Sun
Container gardening starts with the container itself. Choose a pot with drainage holes — this is non-negotiable for herbs, which rot quickly in soggy soil. Go at least 10 inches deep for most culinary herbs. Fill it with a well-draining potting mix or peat-free compost, never heavy garden soil or clay-based dirt.
Sunlight is the other make-or-break factor. Place your herbs where they receive at least 6 hours of direct sun per day; 7–8 hours is ideal. If you’re growing indoors, a south-facing window works best, and a grow light can supplement natural light during shorter winter days.
| Herb | Sun Preference | Watering Note |
|---|---|---|
| Basil | Full sun, but bolt in extreme heat | Vulnerable to overwatering — let soil dry between waterings |
| Mint | Full sun to partial shade | Grow alone; spreads aggressively |
| Rosemary | Full sun | Prefers drier soil; avoid wet feet |
| Parsley | Full sun to partial shade | Keep consistently moist but not waterlogged |
| Thyme | Full sun | Drought-tolerant once established |
| Cilantro | Full sun, but bolts quickly in heat | Succession sow every 2–3 weeks for continuous harvest |
| Chives | Full sun to partial shade | Regular moisture, well-drained soil |
Watering is where most beginners go wrong. Check the soil before reaching for the watering can — insert a finger 1–2 inches into the soil. If it feels dry, water; if it’s still moist, wait. The top inch drying out between waterings is a healthy rhythm for most herbs.
Planting From Seed or Seedling
Starting from seed takes a little longer but costs less. Sow seeds in a shallow tray or small pots filled with fine seed-starting mix, planting each seed no deeper than twice its diameter — about 1/4 inch for most small herb seeds. Keep the mix consistently moist until germination. Covering the tray with a clear plastic bag creates a mini-greenhouse effect; remove the bag once sprouts appear.
For basil and cilantro specifically, soil temperature matters. Cilantro seeds germinate at around 55°F, while basil prefers warmer soil at roughly 65°F. Outdoors, wait until the last frost date has passed and soil temperatures reach at least 65°F for most warm-season herbs.
If you’re starting with seedlings from a nursery, dig a hole about twice as wide as the root ball, drop the plant in, backfill, and water well. Space plants 6–8 inches apart so air circulates and each herb gets its share of light. Firm the soil around the base and keep the soil level below the container’s rim — this reduces overflow when you water.
Once your herbs are established, keep them productive by harvesting correctly. Wait until plants reach 6–8 inches tall, then take no more than one-third of the plant at a time. For basil and other leafy herbs, pinch off growing tips to encourage bushier, fuller growth.
The Common Mistakes That Kill Herb Gardens
Overwatering tops the list. Basil is especially sensitive — its roots rot quickly when left sitting in water. If you’re reusing pots, remove old soil and debris first to avoid mystery plants and lingering pests.
Other frequent failures include using heavy clay soil, giving too little light, planting mint with other herbs, and letting herbs flower too early. When you see flower buds forming, pinch them off. Allowing basil or cilantro to flower signals the plant to stop producing leaves and focus on seeding.
Most herbs rarely need fertilizer, so skip the heavy feeding schedule. A light potting mix already contains what young plants need.
Spring is the best time to start in most U.S. regions, after the last frost passes. For a continuous harvest of annual herbs like cilantro, sow a new batch every 2–3 weeks. If you’re growing on an apartment balcony or windowsill, containers make a small herb garden completely doable. When you’re ready to shop for pots, soil, or a starter kit, our roundup of the best small herb garden setups covers tested options that fit tight spaces.
The payoff is real: fresh herbs a few steps from your kitchen, at a fraction of grocery-store prices.
FAQs
How often should I water potted herbs?
Water when the top inch of soil feels dry to the touch. This typically means every 2–3 days in warm weather and less frequently in cooler conditions. Push a finger 1–2 inches into the soil — if it comes out dry, water thoroughly until it drains from the bottom holes.
Can I grow herbs indoors on a windowsill?
Yes, if the window faces south and receives at least 6 hours of direct sunlight daily. Windowsills with less light will produce weaker, leggier herbs. A grow light positioned 6–12 inches above the plants supplements natural light effectively during darker months.
Should I put rocks at the bottom of herb pots?
Drainage holes matter far more than a rock layer. A pot with holes plus well-draining potting mix is the reliable approach. Some gardeners add a layer of broken pottery or gravel, but this isn’t necessary — well-draining soil and holes prevent waterlogging on their own.
References & Sources
- West Virginia University Extension. “Herb Gardening for Beginners.” Covers pot depth, drainage, sun requirements, and planting guidance for container herbs.
- Brooklyn Botanic Garden. “Starting an Herb Garden in Small Outdoor Spaces.” Details on container selection, soil mix, and small-space herb growing.
- BBC Good Food. “How to Make an Herb Garden.” Provides seed-starting technique, mint isolation advice, and harvesting tips.