I planted 25 ranunculus corms in pots indoors in February and most thrived and growing approx 6" stems with plenty of leaves. However, before planting out at start of June all of the plants stems started to flop over with the leaves turning yellow and brown. I thought when I planted them out they would improve but only one of the plants is about to produce a flower with the rest looking really poorily.
They have a min of 6 hours sun a day are in good well drained soil with no sign of any pests or mould ?
Can anyone suggest what has gone wrong ?