Gardenia Care. - Knowledgebase Question

Gloucester, MA
Avatar for Lattotom
Question by Lattotom
March 25, 2001
We just received a Gardenia plant as a gift. Please tell us what we need to do to keep it healthy. Water, feeding, temperature, and light necessary to keep it healthy and blooming.
Tom Lattof

Answer from NGA
March 25, 2001
You didn't say if your gardenia is indoors in a pot or outside in the landscape, but considering your location
I'm going to assume it's outdoors. There are many things that can cause leaf drop. One is common - gardenias are
very susceptible to spider mites, which cause tiny webs on the undersides of leaves and where the leaves join the
stems. Another way to detect them is to take a sheet of white paper out to the bush, tap a few branches on to the
paper, fold the paper in half and press/rub together. If you see little red, blue, or brown smears, those are spider
mites. You can spray them off with a strong blast from the hose (do this daily until they're under control). A
product called Neem can also be used to treat for spider mites. Follow product instructions for application.

Gardenias need at least a half day of full sun to bloom, but at the same time, the hot afternoon sun can be tough on
them. Morning sun is best, so an eastern location would be ideal. You might also try a southern or western
exposure with some filtered shade. Buds that turn black or drop and bottom leaves that are yellowed are sure
signs that gardenias aren't getting enough light.

Leaf drop can also be caused by improper soil pH (gardenia require 5-5.5pH - on the acid side.) Yellowing and
leaf drop are also signs of various soil nutrient deficiencies such as nitrogen, zinc, and iron.

Finally, if the air is too dry, your plant will drop buds and leaves. Try sprinkling the plant every morning to
increase humidity

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