Growing Thyme Indoors — Complete Guide
Yes, Thyme can be grown indoors. Here's everything you need to know: container size, light requirements, watering schedule, and how to avoid the most common mistakes.
Thyme Indoors — At a Glance
Container Size for Indoor Thyme
Recommended: 6–8 inch pot
Thyme is compact and well-suited to small containers. A 6-inch pot is sufficient for one plant; plant 2–3 plants in an 8-inch pot for a fuller display. Terra cotta is ideal.
Light Requirements
Hours of Light Needed
14–16 hours
per day, consistently
Grow Light Recommendation
Thyme needs 14–16 hours of bright light indoors. A south-facing window in summer; supplement with a full-spectrum LED grow light positioned 4–6 inches above in fall and winter.
Watering and Humidity
Ideal Humidity: 30–50%
Thyme is a Mediterranean herb that thrives in dry conditions. Standard home humidity is usually fine. Avoid humid bathrooms and areas with poor air circulation.
Ideal Temperature: 60–80°F (16–27°C)
Keep away from cold drafts (air conditioning, windows in winter) and excessive heat sources (heaters, ovens). Consistent temperature produces the most vigorous growth.
How to Grow Thyme Indoors: Step by Step
Prepare a free-draining mix
Mix standard potting soil with 30% perlite or coarse sand. Fill a terracotta pot with drainage holes.
Plant from transplant or cutting
Thyme grows slowly from seed — start with a nursery transplant or a 3-inch stem cutting. Remove lower leaves and insert into moist potting mix.
Maximize sunlight
Position in your sunniest window or under a grow light for 14–16 hours. Thyme weakens and becomes disease-prone with inadequate light.
Water sparingly
Water only when the top 2 inches of soil are completely dry. In winter, reduce to once every 10–14 days. Less is more with thyme.
Harvest frequently
Snip young stem tips regularly — this keeps the plant bushy and prevents it from becoming woody. Never cut into old, brown stems.
Common Indoor Thyme Problems & Fixes
Woody, sparse growth
Cause
Old, uncut stems that have become woody
Fix
Trim back by one-third regularly; replace plants every 2–3 years as they age
Root rot
Cause
Overwatering — thyme's primary indoor killer
Fix
Water only when soil is completely dry; use a gritty, fast-draining potting mix
Pale, leggy growth
Cause
Insufficient light
Fix
Move to brighter location or add grow light
Frequently Asked Questions
Can I grow Thyme indoors?
Yes, Thyme can be grown indoors with the right conditions. You'll need 14–16 hours of Full sun — 6+ hours minimum, a 6–8 inch pot, and temperatures of 60–80°F (16–27°C). The difficulty level for growing Thyme indoors is Easy.
How much light does indoor Thyme need?
Indoor Thyme needs 14–16 hours of light per day. Thyme needs 14–16 hours of bright light indoors. A south-facing window in summer; supplement with a full-spectrum LED grow light positioned 4–6 inches above in fall and winter.
What size container does indoor Thyme need?
Thyme is compact and well-suited to small containers. A 6-inch pot is sufficient for one plant; plant 2–3 plants in an 8-inch pot for a fuller display. Terra cotta is ideal.
Best Cities for Growing Thyme Outdoors
If you're growing Thyme indoors year-round, check the outdoor calendar for your city — you may be able to grow it outside during warmer months too.
Growing Thyme Outdoors Too?
Find the best planting times for Thyme in your city with our climate-based calendar.