Is there any danger in spraying rex begonias with insecticidal soap ( Safer's ) ? I know they don't take too well to having wet leaves and I don't think they have any spider mites, but unfortunately right now I'm battling an invasion that I didn't catch quickly enough, and I do have a lot of infected plants - 3 types of ivy, a gold dust dracaena, a hypoestes and a fittonia.

I think the best would be to spray all my plants, but I hesitate for the begonias - I have 4 of them and they're doing great, but they were close to an infected plant. Should I spray them, or just watch and hope they remain bug free ?

Thanks once more for your reply, Will... I've checked and re-checked my begonias ( under good light and with a magnifying glass ) and they do seem bug-free. I guess the little devils are so busy munching on everything else that they forgot about my rex !

There is no warning against begonias on the bottle, but I will do as you say - spray one leaf and see what happens.

I'm now off bug hunting...