Midget Arborvitae - Knowledgebase Question

Issaquah, WA
Question by kakishin
June 21, 1999
Eight years ago I planted a row of young Hetzi Midget Arborvitaes to hide the empty space below the front porch. They are now healthy plants of about 18" to 24" in height and circumference. However, they seem to have become top heavy, either laying over on their sides or separating at the top, opening up and revealing their unattractive, brown inner branches. Should I prune them, stake them, tie them back together, or is there another solution?


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Answer from NGA
June 21, 1999

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Your Hetz Midget Arborvitae have reached their mature size. You can prune them back to generate new growth in the center of the plant by carefully cutting back to an inward-facing bud. Don't prune off more than one-third of the live plant tissue, though, or you'll stress your plants. It may take two or three years of annual pinching and pruning to get your little shrubs back into shape, but you can keep them looking neat and tidy in years to come by pinching them back each spring.

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