Dear Friend,
We offer Bio fertilizers, which are very good for Roses and are used by horticulture growers. you could use it for very good flowering and quality of roses. feel free to contact us for your requirements,Please contact.....
for Roses horse dung{cakes} is very much suitabe .try one kg of horse dung, mix with good fertile red soil {two kg} keep some days with minimum moisture and apply mixing with biofertilizer some of 100gms and apply after pruning