Get Mullein seeds
The first step in growing Mullein at home is to purchase good quality seeds from your local nursery. You can also grow a mullein plant from its cuttings as well; however, you should look to get cuttings from a healthy, fully grown mullein plant.
Decide the location
After having purchased the seeds or the cuttings, the next step is to decide on a suitable location in your house. These plants grow well in full sun, so choose a sunny location in your garden. Mullein thrives best in dry, alkaline soil.
It is generally recommended that you grow these plants indoors, in a pot, and transplant to the garden after the seedlings are hard enough to survive. If you will sow the seeds directly, there is a high probability that they will be consumed before germination.
Sow the seeds
This plant can be grown both in the early spring (after the last frost) or in late summer. Scatter the seeds on the top of a good mix of compost and press them gently into the soil, so that a thin layer of the potting soil covers them. Put three to four seeds in each pot and thin them after the seedlings have grown. Mullein seeds take 10 to 14 days to germinate.
Transplant to the garden
Once the seeds have germinated and the seedlings have their second leaves, divide the seedlings and transplant them to the garden or a larger container. When putting out the seedlings in the garden, keep a distance of one foot between two seedlings.
Water your mullein plants once every two weeks (three glasses of water for each plant), allowing the soil to dry between each watering.
For healthy growth, feed your mullein plant with the right balance of fertilizer mix.