Description
Stark® Raspberry Food is a water-soluble 20-21-20 fertilizer formulated specifically for raspberry plants — a balanced, nearly equal NPK ratio that reflects the unique nutritional demands of raspberries, which need significant nitrogen for vigorous cane growth, phosphorus for root development and fruit set, and potassium for fruit quality and plant vigor all at the same time. Mix and dissolve in water for liquid application directly to the root zone, where nutrients are immediately available rather than waiting for granular breakdown. Use in early spring as new growth begins on new or established beds. Works for red, gold, purple, and black raspberry varieties.
The package treats a linear 80-foot area. Mix 4 ounces per 1 gallon of water.
Always follow the instructions on the label:
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20-21-20 — Balanced for Every Raspberry Nutritional Need
Unlike fruit trees that primarily need nitrogen in early spring, or strawberries that primarily need phosphorus for flower set, raspberries have roughly equal demands across all three major nutrients through the growing season. Vigorous new primocane growth requires nitrogen. Root system development and flower bud formation require phosphorus. Fruit development, quality, and plant stress tolerance require potassium. The near-equal 20-21-20 ratio addresses all three simultaneously rather than prioritizing one at the expense of the others.
Water-Soluble — Immediate Root Zone Availability
The water-soluble, liquid-application format delivers nutrients directly to the root zone in a form the plant can absorb immediately. Granular fertilizers require soil moisture, microbial activity, and time to break down into plant-available forms. Raspberry Food dissolves in water and goes directly where it’s needed, making it the faster-acting option for early spring feeding when raspberry canes are emerging and the plant’s nutritional demands are highest.
For All Raspberry Types — Red, Gold, Purple, and Black
Whether your planting includes Heritage Red Raspberry, Double Gold, Bristol Black Raspberry, Crimson Night, or any other variety in the raspberry family, Raspberry Food’s balanced formula supports them all. The single formula covers the nutritional needs of every raspberry type without adjustment.
Why Growers Choose Stark® Raspberry Food
- 20-21-20 balanced formula — equal support for cane growth, root development, and fruit quality
- Formulated specifically for raspberries — red, gold, purple, and black varieties
- Water-soluble liquid application — immediate root zone availability, faster uptake than granular
- Early spring application — feeds canes when nutritional demands are highest
- Treats a linear 80-foot area — practical coverage for new and established raspberry beds
- A Stark Bro’s exclusive — formulated for the raspberry plants we grow and sell
