Product listings most commonly state Shake 'n Feed formulas feed plants for up to three months. Some individual descriptions list shorter durations (about one month) depending on the specific formula.
Shake the granules evenly onto dry soil, mix them into the top 1–3 inches for in-ground beds, or work them throughout the potting mix for containers. After applying, water to activate the granules and begin feeding.
Product descriptions call out roses and flowering plants specifically and also state the granules are suitable for most outdoor plants, including in-ground and container plants, vegetables, annuals, and perennials.
The product details include N‑P‑K ratios such as 0‑0‑0 and 3‑6‑4, depending on the specific Shake 'n Feed formula.
One product description claims you can see vibrant results in as little as one week. Timing may vary by plant type, growing conditions, and the specific formula used.