Generally any organic fertilizer can be used. They will be a complete fertilizer supplying Nitrogen, Phosphorus and Potassium as noted on the package. Additionally, being organic, they will also being supplying all the other nutrients needed for good plant growth. Organic fertilizers will have the NPK noted in the single digits. Organic fertilizers do not "burn" and can be applied throughout the season if desired.
Watering in the hot summer months starting the end of July through September a couple times a month for sure will also be of great value.
