Filled with old-fashioned charm, wallflowers (Cheiranthus) are a staple of the spring garden. Wallflowers come in a wide range of colours, and many are fragrant. They complement pansies nicely, and planting the two together will fill your garden with bright colour and early-spring interest.
Step Two
Wallflower seeds are large, making them easy to handle. Sow the seeds in the fall for spring blossoms. Cover the seeds with 1/4 inch of soil; do not bury them deeply. Germination will occur in 14 to 28 days. Keep the soil moist, but not muddy. When seedlings are between 2 and 3 inches tall, thin them to 9 inches apart.
Step Three
Wallflowers are easy to care for. Water them throughout the growing season; do not allow the soil to dry out. Feed the plants with an all-purpose fertiliser to encourage blooms and general health. Control weeds. Deadhead spent blossoms to encourage more flower production.
https://letsfixit.co.uk/16417/how-to-grow-wallflowers/?utm_campaign=twitter&utm_medium=twitter&utm_source=twitter