I generally grow from seed the cheap way: on a sunny indoor windowsill in a non-heated propagator (basically a seed tray with clear plastic lid).
Once they've germinated, is it best to just take the lid off and leave them indoors to grow on? (warm >20 degrees C, light, but not airy or humid). Alternatively, should I put them in our unheated conservatory? (frost-free, but would be quite a drop in temperature). I'm worried that there's no intermediate stage between germinating and hardening off in the conservatory e.g. a heated greenhouse.
Many thanks in advance,