Info I give is from a Northern's experience so I'm not sure how good it will be for you.

I initially bought a cheap starter fertilizer to get a pasture mix going. It was high phosphorus and caused a huge bloom within a day of the first bloom.

Since the grass you transferred is probably pretty hardy, perhaps a light application of liquid root stimulator fertilizer is all you need. It's available a most garden centers by the gallon in various concentrations. I use it in all new plantings of trees and plants and it really helps. If you'd rather use granular, use an all in one pellet slow release starter type at a low dose. Pasture grass doesn't have the demands of lawn turf. The cheap stuff I had problems with said slow release but had all different colors of pellets and apparently the phosphorus wasn't such a slow release.



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