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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comZone 5, full sun, test moisture with a moisture meter. Use liquid fertilizer every 3 weeks or so. I bring it into home garden room in winter where it sometimes blooms. I am wondering if it is too much sun. This summer has been extremely hot and sunny. Otherwise beautiful, healthy 8 years old. Any ideas?
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1 Comment To "Hibiscus Tree Doesn’t Bloom"
#1 Comment By luis_pr On 08/22/2021 @ 7:58 pm
It seems to be getting full sun in there so I wonder if you maybe over-fertilized? Too frequent application may add high levels of nitrogen, which produces nice, green foliage but few or no blooms. Make sure the fertilizer has enough potassium (that is the "K", or last number, in the fertilizer NPK Ratio) and low levels of phosphorus (that is the "P" or last number in the fertilizer NPK Ratio). They do not like to bloom when overnight temperatures are below 60°F, when temps are extremely high or when they have bad drainage (make sure the pot is not full of water at the bottom; if yes, research why).