Hi Alexis,
They've all been out since late March (subject to frost warnings) and fully outdoors since mid-April. I was hoping that the warmer weather of the past month or so would have got them all growing (we've been achieving mid-20sC virtually everyday, occasionally hitting 30C, with night-time temperatures rarely dipping below 15C). I did wonder whether it was overcrowding or a pest, but discounted these as none of the other plants appear affected (beyond smaller/less vigorous growth). Of course, it may be that I've lost this plant but the fact it's still in apparent good health (gree