Start your seeds 8-10 weeks before you wish to transplant them outdoors. Use a propagation tray with sterilized potting soil or rooting plugs in seed cells. Mint
seeds require light for germination, so leave them on the surface of the soil and press them down gently. Do NOT cover the seeds! Use a seed heat mat for best results, as the seeds require an average temperature of 65-70ºF.
The best setups have a grow light that starts just above the tray, and can be lifted higher as the plants grow, this reduces the plants stretching themselves to reach for the light, or becoming “leggy”. Use a spray bottle or carefully water to keep soil evenly moist, but not soggy. Mint tends to germinate in 7-15 days.
Mint can be considered invasive, so it’s usually recommended to keep mint in a container and pinch any runners (shoots that try to escape the pot) before they
can root. If you are going to plant it, be prepared to keep it well trimmed or it will take over.
How to maintain, use, and propagate Mint
Mint doesn’t need a lot of fertilization, though it needs regular watering (about 1”/week). Mint can be susceptible to pests, but any plant with strong odors is a deer deterrent, so if you’re looking for plants that have to withstand deer, fragrant herbs are a good choice. Use mint fresh or dried, prune regularly, and propagate from cuttings if you need more plants quickly.