Hi all,

I wintersowed various OP tomato seeds (Thanks, Trudi!) and transplanted them to containers with slightly old potting soil amended with manure and blood & bone meals, fed them seaweed/fish fertilizer, and they were happy enough that I took off their waterbottle hotcaps last weekend.

This Saturday I topped them off with a couple of inches of new MG organic potting mix (so the stems could grow more roots), and I didn't replace the hotcaps. Only about one or two sets of true leaves were above ground, so I probably should have.

The next day I checked on them, and 7 of the 9 plants had been bitten off at or near the growing tips, which I assume means they're goners. The remaining little stems are solid and healthy-looking, not wilted.

Could I have introduced pests via the MG organic potting mix? Are rats or mice (urban rooftop garden) possible?

At this point, I want to buy seedlings and get them going ASAP, but not if they're going to be chomped down again.

Sorry I don't have pix. All advice appreciated.