Fertilizing Wave Petunias: Frequency, Types, and Annual Nature

Fertilize Wave petunias every other week with liquid fertilizer (follow label, don’t over-concentrate). Water before fertilizing—never fertilize dry plants. Better yet, mix time-release fertilizer (e.g., Osmocote Plus) into soil at planting for 2–3 months of feeding.

Clip 3–4 stems in half weekly to keep plants bushy—flowers form only at stem ends. Petunias are annuals; they die in winter and don’t return. Buy new each year for best performance.