Saint John Wort
Q.

Saint John’s Wort Plant

Zone Aurora Co. 80016 | Anonymous added on February 17, 2017 | Answered

How do l cut it back this spring from last year's growth?

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on February 18, 2017

St John's Wort blooms on new wood. The flowers that appear in mid to late summer develop on the new growth that appears in the spring.
Pruning should take place in early spring, before the new growth appears.
Shrub varieties of St John's Wort should be pruned back by about 1/3 of the total height of the plant.

https://www.gardeningknowhow.com/edible/herbs/st-johns-wort/st-johns-wort-plant-care.htm

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