Sudden Impact for Roses fertilizer alternative
I keep reading that Sudden Impact is the best rose fertilizer but I have 150 roses and have to fertilize more often due to sandy soil so I'm looking for a cheaper alternative.
( I am still regularly trying to improve the soil after 7 years!)
One homemade fertilizer recipe I came across on the internet was:
3kg sulphate of ammonia 1kg iron sulphate 2.5kg potash 1kg dried blood 1kg Epsom salts
Has anyone tried this? or can you share your own fertilizer recipe that is balanced with everything a rose needs?