How to Germinate Catmint Seeds

Germinating catmint (Nepeta spp.) seeds can be a rewarding process as these plants are excellent for attracting pollinators and add beauty to your garden. Here are the steps you can follow to germinate catmint seeds successfully:

Materials Needed:

• Catmint seeds
• Seed-starting mix or a mixture of fine soil and compost
• Seed trays or small pots
• Plastic wrap or a clear plastic cover (to retain moisture)
• Spray bottle (for watering)
• Labels (optional)

Steps:

1. Seed Selection and Preparation:
   • Purchase fresh catmint seeds from a reputable source. Ensure they are not expired.
   • Some gardeners prefer to soak seeds in water for 12-24 hours before planting to soften the seed coat and enhance germination, though this step is optional.
2. Preparing the Seed-Starting Medium:
   • Fill seed trays or small pots with seed-starting mix. This mix is typically lighter and more sterile than regular garden soil, reducing the risk of disease.
   • Moisten the seed-starting mix with water. It should be damp but not waterlogged.
3. Sowing the Seeds:
   • Plant the seeds on the surface of the soil. Catmint seeds are tiny and should not be buried deeply. Lightly press the seeds into the surface of the soil or cover them with a very thin layer of the seed-starting mix (no more than 1/8 inch).
4. Providing the Right Conditions:
   • Cover the seed trays or pots with plastic wrap or a clear plastic cover to retain moisture and create a greenhouse effect. This helps keep the seeds warm and moist.
   • Place the covered trays or pots in a location that receives bright, indirect light. A temperature range of 65-70°F (18-21°C) is ideal for germination.
5. Watering:
   • Use a spray bottle to lightly mist the soil surface to keep it moist. Avoid overwatering as this can cause the seeds to rot.
   • Check the soil regularly to ensure it remains moist but not soggy.
6. Germination Time:
   • Catmint seeds usually take 10-21 days to germinate under ideal conditions. Be patient and keep the soil consistently moist.
7. Growing Seedlings:
   • Once the seeds germinate and seedlings appear, remove the plastic cover.
   • Continue to provide bright, indirect light. If natural light is insufficient, consider using a grow light.
   • Water the seedlings carefully to keep the soil moist but not waterlogged.
8. Transplanting:
   • When the seedlings have developed at least two sets of true leaves and are large enough to handle, they can be transplanted.
   • Harden off the seedlings by gradually exposing them to outdoor conditions over a week or so before planting them in the garden.
   • Choose a location with well-draining soil and full sun to partial shade for transplanting.

Additional Tips:

• Thin the seedlings if they are overcrowded in the trays or pots to prevent disease and encourage strong growth.
• Fertilize the seedlings lightly with a diluted, balanced fertilizer if needed, though catmint generally isn’t heavy feeding.
• Space the plants adequately in the garden, usually about 12-18 inches apart, depending on the variety.

By following these steps and providing the right conditions, you can successfully germinate catmint seeds and enjoy the delightful plants in your garden.