How to Grow Iberis Sempervirens From a Seed

Germinate the Iberis sempervirens seeds in a seed flat full of commercial seed-starting mix. Moisten the mix well before placing the seeds on the surface of the soil. Cover the flat with plastic wrap to keep everything moist then set it on a heat mat, set to 68 degrees Fahrenheit, in a sunny location. Candytuft seeds germinate within two weeks.

Remove the plastic wrap and turn off the heat mat when the seeds germinate. Keep them in a bright area out of direct sun.

Transplant the I. sempervirens seedlings into the garden when they have three to four sets of leaves. Handle them carefully because the stems have a tendency to break.

Ensure that the soil in the candytuft bed is well drained. If needed, add 3 inches of coarse sand or chunky compost to speed up drainage. Combine the amendment into the top 6 inches of soil.

Plant the I. sempervirens in holes the same depth as they have been growing in the flat. Water after transplanting and keep the soil moist while they become established in the garden. Once established water the plant only if there is no rain for two weeks, then irrigate to a depth of 6 inches.

Fertilize Iberis sempervirens every spring with a slow-release all-purpose garden fertilizer, such as a 10-10-10. Use the rate listed for the size of your plant. Wash off any fertilizer that lands on the foliage.

Cut back the I. sempervirens after it blooms to prompt it to remain compact and bushy. You can safely cut all the stems back by one-third of their length.

Cover the Iberis sempervirens plants with mulch or branches from evergreen trees to protect them over the winter.