I have 150 roses growing in large containers. I have been fertilizing them every 3 weeks with a reduced concentrate of fish emulsion. My roses are fine with this fertilizer, but applying it in two gallon watering cans is getting tedious.I was wondering if the regimen mentioned by Seil would be a more practicable alternative. I was thinking of the following:
Osmocote every four months year around (in Hawaii our growing season is year around);
fish emulsion in the in-between months.
Osmocote comes in two forms--2874150 and 274850. Is one better for roses?
