Q.Wisteria
What causes my wisteria to not bloom every year? It is an old vine of three but this year no blossoms. Is there anything I can do to promote blooms? Thank you for your response.
Downtoearthdigs
Answered on June 25, 2015
It sounds like that it is lacking nutrients. I would recommend giving it some balanced fertilizer. I would also check that it is still getting enough sunlight. Sometimes, over time, surrounding plants and building can block sunlight from a plant and cause it to lose vitality. This article may also help: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm
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