Potted chrysanths dying
I bought a tray of 6 little chrysanthemum plants from B&Q as part of my annual purchase of plants for patio pots. After only a week, the flowers have mostly died or are dying and there's no real sign of any further buds. I actually had the same plants last year, and after the flowers had gone within a couple of weeks, no more came, even though the plant survived the winter. I had hoped it was a one-off bad batch last year! They're being watered every night. Can anyone tell me what I'm doing wrong?