Sowing The Seed
Pennyroyal Mint seeds are pretty tiny, so they are best established indoors, in a controlled environment. Start in peat pots, 6 to 8 weeks prior to the last frost. Scatter the tiny seeds directly to the surface of the soil, not covering them with any topsoil, since the will require light to germinate properly. Transplant your Pennyroyal Mint herbs into larger pots or containers once the weather is warm and all danger of frost has passed. If direct sowing outdoors, be aware that Pennyroyal Mint can spread through underground runners, so sowing in pots, or a contained area is best.
Growing Conditions
Pennyroyal Mint herbs are fairly adaptive when it comes to lighting. They can thrive in areas of full sun or partial shade and require temperatures of at least 70F to flourish. The soil can be rich in organic matter, or poor and sandy, just make sure that it is well drained. To increase your drainage, we recommend adding a light compost to any areas that consist of hard, compact soil. Water the soil daily with a light mist setting or spray bottle, to avoid the disruption and/or washing away of your Pennyroyal Mint seeds.
Germination & Growth
Pennyroyal Mint can be more of a difficult herb to establish from seed, but they typically take anywhere between 7 and 28 days to germinate successfully. The plants grow vigorously, to a mature height of about 1 foot tall, and again should be placed in containers or in a controlled area to prevent it from spreading into other areas of the garden. The purple flowers will bloom several weeks after the plants are established, attracting many bumblebees & honeybees as well. Use these herbs to ward off pesky insects, such as fleas and mosquitos.