My agapanthus 'Headbourne Hybrid' is about 12 years old and has made a huge plant - (last year it produced 21 flower heads) - but instead of holding the flowers upright the stems arch over. Without support, the flowers would almost touch the ground. I try to tie them up but the result is a mess of curved stems, canes and string!
Does anyone know if there is anything I can do to make it more upstanding, please? Should I feed it with something - ( a friend suggested Viagra ::)) - if so what and when?
Thank you.