Chillies.

[zabado]

I'm growing several types of chillies plants and they're all green, lush and growing well. But one, (which is just as green) has it's flower stems turning a pale yellow and dropping off what's wrong with it ?. Thank you.

[Chipchopper]

Sounds like it could be 'blossom end rot'. Try to keep them evenly watered, without drying out in between.
Could also be due to a calcium deficiency.

[zabado]

I don't think it is "blossom end rot" chipchopper because they're not even in bloom yet and the whole of the stem/bud falls off.

[rowanwitch]

Check for spidermite,
Also a cool night will do it if they got chilled.
The third possibility might be a trace element problem try a natural seaweed feed once a week.