St. John's Wort Plants

St John’s Wort

Zone Symmes Township Ohio 45140. Zone 5? | added on July 4, 2017 | Answered

Have had St John\'s Wort for at least 20 years, but after the first couple of years it\'s blooms diminished. We have added Peat to the soil, with limited results. The foliage appears healthy. It is in a mostly sunny spot, and I don\'t believe I can move it, although I have transplanted small offshoots.

A.Answers to this queston: Add Answer
Answered on July 5, 2017

You may have excess nitrogen in the soil, which will inhibit flowering.
You an feed phosphorous, with Bone Meal.

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