What can I use to make our old hydrangeas flower. Is liquid potash suitable
Yes, our Liquid Potash is the best thing to use now to try to stimulate flowering:
Next year, in MAR & SEP, fertilise them with Thrive Natural Roses & Flowers pellets as well:
Pruning can be done any time after flowering is over. Ensure that you don’t prune any stems that have not produced any flower buds as these will provide you with flowers for next season.
Answered: 9 Dec, 2020