On the local Sydney radio gardening program, a caller rang in to ask about the colour of her rhubarb, it not being as red as it usually is. The gardening expert said that temperatures above 25C cause rhubarb to not develop its full colour, and that the 3 or 4 days earlier in the month when our temperatures (it's Summer here) were well above 25C would be the cause.
I've never heard of this. My parents have had rhubarb growing for over
40 years, and even in mid-Summer when their daytime temperatures are rarely under 25C for weeks on end their plants always had plenty of red stems.Every other gardening expert I've heard talk of the colour of rhubarb has said that it's genetic, and that there is nothing apart from replacing the plants will change green stemed rhubard into red!
Any one have any experience with warmer days causing rhubarb to grow with a duller stem colour?