When to Plant Catnip
Hardy perennial herb beloved by cats and useful in tea. Easy to grow — the challenge is keeping cats from destroying it before you harvest.
The Short Answer
How to Grow Catnip
Catnip is a vigorous, spreading perennial mint relative that's famous for its effect on cats — roughly two-thirds of cats respond to nepetalactone, the compound that triggers the euphoric rolling behavior. For human use, catnip makes a mild, calming tea. The gardening challenge is protecting young plants from cats — they'll roll in it, crush it, and dig it up before it can establish. Once established, catnip is robust enough to survive cat attention. Grow from transplants rather than seed (seeds are tiny and slow to germinate). The dried leaves are more potent than fresh for cat toys.
Starting Seeds Indoors
Begin catnip seeds indoors 6 weeks before your average last frost date. Seeds need soil temperatures of at least 55°F to germinate, which typically takes 7-14 days. Provide 12 hours of light per day using a south-facing window or grow lights.
Transplanting
Move seedlings outside 0 weeks after your last frost date, once soil temperatures reach 55°F. Harden off seedlings for 7 days before transplanting by gradually exposing them to outdoor conditions.
Direct Sowing
Catnip can be direct sown 0 weeks after your last frost date. Plant seeds 0.125" deep, spaced 18" apart.
Growing Tips
Protect young plants from cats until established — they will roll in it and crush it. Established plants grow back vigorously. Makes a mild, calming tea. Dried leaves are more potent than fresh for cats.
Companion Planting
Good companions:
Catnip Planting Dates by State
Click your state for catnip planting dates specific to your location:
Last reviewed: March 29, 2026