Posted: 16/04/2013 at 08:27
My question is whether everything needs to be thinned down to a single seedling? For some, such as the cucumber which grows thick stems this is obvious. For other things such as basil, pak choi and salad mix, the seedlings grow much thinner and I don't know. With these, should I thin them all to one now, just separate them once I prick them out into larger pots (and risk tangled roots breaking?) or prick them out all together in a clump once they've grown more and pot them on exactly like this?
The toms, chillies, cukes, peppers, broccoli, etc, need to be potted on as individual plants. As should the salad mix. Left as clumps they will only throttle each other.
The likes of basil and coriander can be separated into individual plants but will cope as two or three plants together. Do the separating when they're large enough to handle. You just need to take care separating the tangled roots but you don't need surgical precision. Root structures are pretty forgiving unless you tear them off completely.