Window Herb Garden Setup Cost Calculator

Know what it costs to grow herbs on your windowsill.

$
$
$
$
$

Frequently Asked Questions

How many pots do I need for a starter windowsill herb garden?
Most beginners start with 4–6 pots, which fits comfortably on a standard windowsill and gives you a useful variety without becoming overwhelming. Good starter herbs include basil, mint, chives, parsley, and thyme. Keep mint in its own pot — it spreads aggressively and will crowd out neighbors.
Do I really need a grow light for indoor herbs?
It depends on your window. Herbs need at least 4–6 hours of direct sunlight per day. A south- or west-facing window in spring and summer often provides enough light without a grow light. North- and east-facing windows, or windows shaded by trees or buildings, usually benefit from a simple LED grow light ($20–$50), which can double or triple your herb yields.
Should I start herbs from seed or buy starter plants?
Seeds are much cheaper (around $2–$4 per packet versus $3–$6 per starter plant) and a single packet can produce dozens of plants. However, some herbs like rosemary and lavender take 4–6 weeks to germinate and months to reach a harvestable size. For quick results, buy starter plants of slow-growing herbs and start fast-growers like basil and cilantro from seed.
What potting mix should I use for indoor herbs?
Use a quality all-purpose potting mix, not garden soil. Garden soil compacts in containers, drains poorly, and can harbor pests and diseases. A 4-quart bag ($8–$12) is enough for six small pots. You can mix in a small amount of perlite to improve drainage, especially for Mediterranean herbs like rosemary and thyme that dislike wet roots.
How much can I save by growing my own windowsill herbs?
Fresh herb bunches at the grocery store typically cost $2–$4 each. With six herb pots producing one harvestable cutting per month each, you save roughly $12–$24 per month. A $40–$60 windowsill herb garden setup usually pays for itself within 2–4 months. After the initial investment, ongoing costs are minimal — mainly occasional fertilizer and fresh potting mix when repotting annually.

How Much Does a Windowsill Herb Garden Cost to Start?

A windowsill herb garden is one of the most affordable ways to grow fresh food at home. Startup costs typically range from $20 to $80 depending on how many herbs you want to grow, whether you start from seed or buy starter plants, and whether your window provides enough natural light.

Breaking Down the Costs

  • Pots or planters: Small 4–6 inch terracotta or plastic pots cost $2–$8 each. A set of six matching pots runs $15–$30. Self-watering pots cost more ($8–$15 each) but reduce maintenance.
  • Potting mix: A 4-quart bag of quality potting mix ($8–$15) is enough to fill six small pots. Avoid garden soil — it compacts and drains poorly indoors.
  • Seeds or starter plants: Seed packets cost $2–$4 each but take 2–4 weeks to germinate. Starter plants from a nursery or grocery store ($3–$6 each) let you harvest sooner. Basil, mint, chives, parsley, and thyme are the most beginner-friendly choices.
  • Grow lights: If your window gets fewer than 4–6 hours of direct sunlight daily, a simple LED grow light ($20–$50) prevents leggy, weak plants.

When Does It Pay Off?

A bunch of fresh basil or cilantro at the grocery store costs $2–$4. With six herb pots producing even one bunch each per month, you save $12–$24 per month. A $40 herb garden setup pays for itself in 2–3 months.

Tips to Keep Costs Low

  • Start from seed for herbs like basil, cilantro, and chives — they germinate quickly and seed packets cost far less than starts.
  • Buy starter plants for slow-growers like rosemary, thyme, and lavender so you can harvest sooner.
  • Use repurposed containers (mason jars, tin cans, yogurt pots) with drainage holes drilled in the bottom to cut pot costs to near zero.
  • Split a large bag of potting mix with a neighbor or friend to reduce waste and cost.