Pot up seedlings from coir pellets or modules only when roots reach the edge of the compost
Chard plants sown under cover back in March should have true leaves by now, which means they are ready for a new home.
Half-fill some 8cm or 10cm pots with peat-free multi-purpose compost, with a little grit or perlite added to it. Then make a hole in the compost using a label or dibber and lower the plants into position, and gently add more compost around it so the spindly stem is covered. Finish by firming the plant in gently and watering.