When I have yellow leaves, it means I have red spider mites. Look under the leaves for little microscopic red dirt specks. Maybe toss a little epsom salts it's way to green it up.

Brugs are the fertilizer whores of the plant world, what do you consider fertilizing regularly? It might not be enough. Let us know! But at least the growth is continuing, so that's a good sign.

Thanks, I've had spider mites on brugmansias before and the symptoms were nothing like this.

Here are photos of the chlorotic new growth; sure looks like a nutrient deficiency to me, but darned if I know what it needs. I've been fertilizing it regularly (about once a week), and it has been growing well, all spring.

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I checked out some old discussions in this forum and it sounds like this might be magnesium deficiency. Since many people use epsom salts regularly on their brugs anyway, I mixed some up and applied it. Hopefully that will help, or at least not hurt. What I can't figure out is, I've been fertilizing generously and regularly and the fertilizer I'm using does have magnesium in it. Do brugs have unusually high magnesium requirements??

Epsom salt is generally used about once a month at the rate of one tablespoon per gallon of water and it helps generally pale green leaves to darken up. I could be wrong but yours looks like some sort of mites. Hopefully not broad mites but they make the leaves crinkly and affect the new growth. It could be some sort of defiency but the only time I have seen anything like this it was some sort of mite. Regardless I would remove the affected leaves and see how the next ones grow out.

I used to think I was the only miteaphobe. You have had a lot of rain. It could be other things buttttttttttt. 95 % sure it is a mite problem. Unless you had a chemical spill on the roots.