The geranium problem might be Geranium Rust (uromyces geranii). Not
sure about the pelargoniums - western flower thrips perhaps?

David
http://www.usedbookseller.co.uk

The geraniums have small angry browny-red spots under their leaves and
yellow spots on top. The leaves turn brown and the plants looks positively
sick.

Not too sure what to do. What should i spray?

Cheers,