How to Protect Mullein, Roripa

Overview

Mullein, roripa is a Greek species of the mullein biennial. It has elegant, strong stems and filigree, with lemon yellow blooms that grow above a rosette of dark green leaves. The plant does well in a very well drained soil in a sunny spot such as in a rock garden. It thrives even more if planted in a protected area. While roripa mullein is a hardy plant, the growth potential increases when it's protected from excess water and freezing temperatures.

Step 1

Protect roripa mullein from root rot by making sure there is no standing water in the planting bed. The biennial has average moisture needs but should not be kept too wet.

Step 2

Water the plant when the soil is drying out, which should be every 2-3 days. It should not be over-watered or it may rot and die.

Step 3

Buy mulch such as cedar mulch, straw or hay from a garden store or nursery in the fall. Leaves also work well.

Step 4

Mulch the planting area when the ground is cold, such as when there is an inch or two of frost on the ground. This will protect the plants from the alternate freezing and thawing that occurs around wintertime.

Step 5

Keep the soil relatively moist as the ground freezes, to ensure successful winterizing.

Step 6

Add 4-6 inches of mulch to the crowns of the plants. This will protect the rootballs and ensure a stronger plant the following year.