slugs.. I took the trouble to by compressed blocks of chopped coir waste to try and keep the slugs out as I'd noticed on several occasions that the bagged tomato compost in the garden centres had slug slime 7 occasionally slugs between the bags which could have explained why I had so many slugs in the green house a few years back .
it helped but has not been the complete solution I'd hoped for .
This year I put plenty of slug pellets all over the greenhouse floor .. the slugs still managed to chomp the tops off the first set of kidney bean plants I'd sown, but since the second application of pellets on the floor and a few in each tub there has been no attack.
As a belt and braces approach everything in the greenhouse including the outer edges of the floor also got a spray with nematode control when I did the rest of the garden . the first application seemed to work but six weeks later it also got a second going over when I re did the gardens .