Dyna Gro Bonsai Pro 7-9-5. Bonsai trees, like all other plants, require N-P-K plus all the other macro and micro-nutritional elements to survive. While normal trees are able to broaden their root systems, bonsai are planted in small pots and benefit from frequent, weekly applications of Bonsai-Pro. Bonsai Pro offers balanced growth throughout the plant’s life, which can be affected by temperature, light, soil, pruning, watering, and root structure. It can be used all year round and promotes both foliage and blooming. Ensures healthy leaf and stem growth. It is a urea-free formulation and won't burn tree roots. Contains special pH buffers to help maintain a desirable pH. Ample levels of Calcium. There is no need to supplement with a Cal-Mag product Spend less time and money measuring and tweaking products with incomplete, watered-down fertilizers! Bonsai Pro is low in soluble salts which virtually eliminates excessive salt build-up.