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Night Blooming Cereus

Q.Yellowing Spotted Leaves

Zone Toronto, ON Canada | tidblggrrr added on April 18, 2020 | Answered

My NBC used to bloom regularly when we put it here on the right side of this south facing window years ago. About 5 mos ago, tried to give more some new nutrient richer potting soil, I now realize I probably damaged the roots by trying to loosen them w a screwdriver – big mistake. Now she is no longer blooming and some leaves are yellowing and spotting. I normally water only 1/wk and will give her a humidifier if her leafs look flacid. Any suggestions would be greatly appreciated, Thank You!

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Certified GKH Gardening Expert
Answered on April 20, 2020

It is very hard to tell from these photos. Try facing the light source behind you so that it does not drown the picture out.

That growth is VERY stretched. This will indicate that the light source is not enough. I would supplement with a horticultural lamp.

Pruning may also be in order.

Depending on what fertilizer you used, and how much, I would say this is the problem. They do like rich, fast-draining soil, but it is best to feed them at half strength to see how it will respond to the fertilizer.

Pruning may also be in order.

This article will help:


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