Mystery spots/pits on leaf of Cattlianthe

[Harris E.]

Hi everyone,

My Cattlianthe Red Leopard's newest leaves have some crazy spotting and pitting on them. I haven't seen anything like it on my other plants. It's grown in my unheated greenhouse in San Francisco. I really like the flower so I'd like to save this plant - any advice appreciated!

Thanks

Harris

[WhiteRabbit]

[wintergirl]

second bump...

[RJSquirrel]

Pitting on new foliage is usually caused by tissue collapse due to use of water thats too cold or because of too cold temperatures you have had.

also you have a yellowing of the leaves = chlorosis.
May be due to excessive light and/or deficiency in nitrogen. More food and drop the light level down some and might be able to salvage it before its done. I think we all decided some time ago that adding calcium and magnesium will be beneficial for your plant also.

It is very nice flower too

[Harris E.]

Thanks RJSquirrel! I've heard of tissue collapse but never seen it in person. We haven't had night temperatures below the high 40s in the past 30 days - is that cold enough to cause tissue collapse? I use K-lite fertilizer (12-1-1-10Ca-3Mg) so I've assumed I don't need a Cal/Mag supplement. Am I wrong?