I have a Michaelmas Daisy (Bahamas) that is about 4 years old. The plant has flowered profusely every year. This year it grew quite healthily to a height of about 3 ft. No buds or flowers appeared & the plant began to go brown & wither from ground level upwards.
Rightly or wrongly I have cut the plant back to ground level.
Why hasn't the plant fowered & have I done the right thing by cutting it back?