Some more of the seeds have started to sprout as well. The ground cherry and catnip seedlings have sprouted.
If this is your first time planting catnip, make sure you plant it outdoors after the last frost has occurred. It is very easy to start your catnip plant indoors from small seedlings, and it will grow well in warm indoor locations before you decide to transplant it outside. Just make sure you transplant it when it is warm enough during the night for the catnip to survive.
This way, you can continue to cultivate the same seedlings without having to sow new ones every time the cat has finished the catnip made available to him.
How To Grow Catnip | Herb Gardening Guide
How to Grow Catnip Plants (Plus a Warning) - The Spruce
Growing. As with normal catmint seeds require light to germinate so where ever you sow them make sure they are on the top of the soil. . Catmint can be sown directly sown outside in selected location after danger of frost has passed. Make sure the area stays clear of weeds to allow the seeds to germinate in the light. Keep soil moist until germination occurs and until the small seedlings are large enough to be cut back to daily watering. Thin to about 2 feet apart. Since seed germination can be erratic we recommend starting indoors to avoid weeding and have better control. For early start on larger plants sow indoors in late winter to early spring. Ensure the soil is moist until germination and while the seedlings are small. Germination can be erratic ranging from 14 - 40 days especially at cooler temperatures. Some seedlings come up fast while others seem to take forever. For this reason we recommend either small pots or individual cell plug trays so larger seedlings can be removed without disturbing the rest. Once the seedling is established it will grow rapidly and will flower in the first year from seed. How To Grow Catnip From Herb Seeds: Start Nepeta seeds indoors near a sunny window 6 weeks before transplanting to the garden after danger of last frost. Or, if your area has a longer growing season, sow the Catnip herb seeds directly in the garden in full sun when frost danger is over and ground is warm. Make shallow furrows and cover the herb seeds 1/8 inch with loose soil. Thin or transplant the seedlings to 12 inches apart when they are 2 inches tall. Keep plants full by pinching the growing stems and flower buds when they appear. Harvest leaves by cutting the stems anytime during the growing season. The foliage keeps its scent best when air dried.Catnip can be grown from seed or from divisions of existing plants. The seeds are slow to germinate and should be started up to 10 weeks prior to the frost-free date. Although catnip tolerates light frost, the seedlings are more delicate and should not be transplanted until after the danger of frost has passed in the spring. In later years, catnip planted in the ground will likely emerge before the last frost and survive through early spring frosts.Catnip may be considered a noxious weed or invasive plant in some areas. Catnip is known to attract bees, butterflies or birds and has fragrant blossoms. Catnip self-sows freely; remove flowers (deadhead) if you do not want volunteer seedlings the following season.