Happy Frog Japanese Maple 4-3-4 Fertilizer Happy Frog Japanese Maple Fertilizer is specifically formulated for use on Japanese maples, lilies, evergreens, hydrangeas, junipers, dogwoods, flowering ornamentals, and other low pH feeders. This unique blend of fertilizers and microorganisms delivers nutrition where your plants need it most. Contains phosphorus and potassium to support the needs of these beautiful trees. Mycorrhizal fungi are included to help increase root efficiency, which may enhance nutrient uptake and water absorption. OMRI Listed. Packed in a resealable plastic bag. Compare our prices on eBay and $AVE! Description: You are purchasing a 4-Lb. bag of Happy Frog Japanese Maple 4-3-4. Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.