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Plant Answer Line Question

Keywords: Container gardening, Hoya bella, Tropical plants, House plants

My Hoya bella was recently moved outside. It flowered nicely, but now the leaves are a light yellow/green and the soil surface in the pot is covered with moss. What is wrong and what can I do?


Here is some information I found in the book, Subtropical plants: a practical gardening guide (by Jacqueline Sparrow and Gil Hanly, 2002, p. 107), quoted below:

Hoyas do very well in pots. They need bright light, but not sun...Hoyas strike fairly easily from cuttings, taken at the warmest time of the year.

About the yellowing of the leaves...I am pretty confident that this is due to the plant getting too much water (rain, whatever source, while it was outdoors) and the soil not drying out, which also explains what happened to the top of the soil--the moss or algae growth there. I would just gently scrape off the soil surface and put a thin layer of potting soil over it. If the plant starts getting what it needs again (as it did before it was put outdoors), it will hopefully return to its former healthy self.

During its growing season, Hoya bella prefers temps between 64 and 68 degrees; during its rest season, 59 degrees is the recommended minimum temperature (so here in Seattle, right next to a window may be too cold).

University of Florida provides additional information about Hoya bella.

Date 2017-05-17
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Plant Answer Line Question

Keywords: Hoya bella, Propagation

Do you have any information on how to propagate Hoya bella?


I consulted The American Horticultural Society's Plant Propagation (ed. Alan Toogood, DK Publishing, 1999) for information on propagating Hoya. This plant can be propagated by seed in spring or summer, and by cuttings, from spring to summer.

If the seeds are sown fresh and kept moist at 70-81 degrees, they should germinate in a few days. It is more common to increase this plant by cuttings. Cut a length of stem just below a leaf node. The cutting should be 3 to 4 nodes long. Dip its base in rooting hormone (which will also help stop the ooze of sap). Root as you would a stem cutting--fill a pot with a medium of fine grit (top 1/4 of pot) layered on top of gritty cactus soil mix (bottom 3/4 of pot). Gently push the cuttings through the fine grit into the soil mix. Keep slightly damp, but not too humid. If it is not warm enough in your home, provide gentle bottom heat to 70 degrees. They should root in 2 to 6 weeks. New plants will take a year or two to flower.

Date 2017-03-29
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May 23 2018 14:32:42