Once A Year Fertilizer Spike (6 Pack)
Give your aquatic plants the essential nutrients they need to flourish with Laguna Once A Year Fertilizer Spikes. Specially formulated to feed plants for up to one full year, these temperature-activated spikes begin releasing nutrients only when water temperatures reach 50°F or higher—right when your plants start growing.
Each spike delivers a slow, steady release of a balanced fertilizer blend designed to enhance plant size, promote vibrant color, and support overall health. With low phosphorus content and absolutely no copper, these spikes are safe for fish and other aquatic life, and they won’t compromise your pond’s water quality.
Ideal for use in planting baskets and containers, these spikes are easy to insert and perfect for all types of potted aquatic plants. Whether you’re maintaining a decorative water garden or a larger pond, Laguna Fertilizer Spikes make plant care simple, safe, and effective.
Directions
- Push the spike in the soil until cap is just above the soil surface
- After one year, discard the spike, as the fertilizer inside the spike no longer contains
nutrients - Use one spike for 1 or 2 U.S. gal (4 or 8 L) planting baskets
- Use two spikes for 3 U.S. gal (11 L) planting baskets
- Use three spikes for 4-1/2 & 5 U.S. gal (17 &18 L) planting baskets
- Use four or more spikes for > 5 U.S. gal (>18 L) planting baskets
Derived from: Ammonium Nitrate, Ammonium Phosphate, Potassium Nitrate, Calcium Phosphate, Magnesium Sulfate, Boric Acid, Ferrous Sulfate, Iron EDTA,
Manganese Sulfate, Sodium Molybdate, Zinc Sulfate and Zinc Oxide.
Please Note: Phosphorus runoff poses a threat to water quality. Some states restrict the application of phosphorus-containing fertilizer on non-agricultural lawn or turf. Please check your local laws prior to purchase.











