When should I fertilize my roses?

Garden Experts
I have planted new roses. Should I fertilize them immediately after the planting? Or should I wait a while until they are fully grown?

The answer

It is better when the roses first can build roots on their own. Without fertilizers, the plant roots will go deeper into the soil looking for nutrition. 
After six to eight weeks, you can fertilize your roses with 30 g/m² complex fertilizer.