My S. Divinorum has a dark reddish something appearing on the undersides of the leaves, concentrated along the veins. The leaves turn pale and fall off. Any idea what this is and how to clear it up?

TIA

Sure the redness isn't moving very slowly? Might be an infestation of spider mites--- but it'd be a really bad infestation if it's that visible.

Try taking an "infected leaf" and watching it under bright light with a magnifying glass. Or hold a piece of blank white paper under infected leaves and tap the leaves or gently shake the plant (branch)--- see if any tiny tiny dark spots fall on the paper--- then take a close look at them for a while to see if they're moving.

Let us know!

Sometimes deficiencies in phosphorus can cause leaf veins and leaves to become chlorotic and then red or purple as phosphorus is drawn into new growth. I'd first check the ph of the soil to make sure it isn't to acidic. Low ph can cause nutrient lock out. Essentially you may have ample amounts of NPK but the plant is not able to use it because it's become deionized or something. Check the ph with some ph paper and if nessesary leach the soil a few times with plain water.

That's just a suggestion. I'm no expert by any means but it could be worth a try. If you think it's fungus however, try some einstein oil the stuff works great for all kinds of pests and diseases.

Thanks for the help. Definitely not spider mites. I'll get some pH paper and check it out.

Thanks again...