How to Transplant the Persicaria Red Dragon Plant

Timing

• In most climates, autumn is the best time to transplant summer-blooming plants such as Persicaria "Red Dragon." Transplant on a cool, overcast day, as transplantation stresses the roots, which dry quickly on a hot, sunny day and might not recover. Transplant after the last frost in spring if you live in the cooler climates of USDA zones 3 through 6 so the plants have time to become fully established before winter.

Growing Conditions

• Persicaria "Red Dragon" is a tough plant that thrives in nearly any type of soil, including sand, heavy clay or regular garden soil, and soil that is either alkaline or acid. The plant prefers warm temperatures. Although Persicaria "Red Dragon" tolerates partial shade, full sunlight brings out the stunning colors of the foliage. The plant is a vigorous grower but it is not invasive.

Transplanting

• Cut the plant down to about half its height because trimming the foliage directs energy to the roots instead of to the foliage. To transplant Persicaria "Red Dragon," dig the plant along with a large clump of soil around the roots. Dig deeply to preserve as many roots as possible. Dig a hole in the prepared area and work in a handful of compost, blood meal or bone meal. Plant the clump at the same depth it was planted in the original location.

After Transplanting

• Water the plant well and keep the soil moist for the first two weeks, or until the plant is established and showing healthy new growth. Plants transplanted in autumn benefit from a 3- to 4-inch layer of loose mulch such as straw or shredded bark, which conserves moisture and protects the roots. Don't fertilize the plants immediately after transplanting. Spring is soon enough to feed autumn transplants. Give spring transplants three or four weeks for the roots to establish before applying fertilizer.