I have window boxes in my garden filled with pansies I planted in Dec, when should they die off.?

I want to replant with bedding but the pansies are still in full bloom and I don't want to kill them off, but am worried I might leave it to late for me summer bedding. the pansies also have a white powder dust on the leaves, Is this a sign of their end of season?. Thanks. Peter.

I have window boxes in my garden filled with pansies I planted in Dec, when should they die off.?
You don't tell me where you live...that being said; pansies are a "cool" season plant...so they should start flagging say when the temps in your area are consistently above 90 degrees...But plant your "hot" season plants now...Then they'll be ready to take over...
Reply:The thing with pansies is they self seed, this why you still have them. The white powder sounds like mildew, take them all out and make sure you use fresh compost.
Reply:I would agree that the white powder is likely to be powdery mildew. The pansies will be stressed by now hence the mildew, you can transplant them and this often gives them a fresh flush of life but in reality if you want Summer Bedding to give you any worthwhile show then you need to get them into the beds now, should have been in 3 or more weeks ago.





Good luck

Teeth