I purchased a Mandevilla last year. It grew in the Conservatory and was most
spectacular with 100's of blooms. It struggled to survive the winter and was
pruned in March. Many of the leaves are turning yellow and falling off. I
have used insecticides, fungicides and given it a dose of Sequestrene all to
no avail. I also gave it a foliar feed.
As it is a lime hater I have been watering it with water from a barrel-could
this be the problem ?
Tom Atkinson