Bud-XL is a late bloom flower enhancer. It is designed to redistribute and re-focus sugar concentration by extracting some of the sugar from the bracts (flowering area leaves) to free them up for more sugar and energy for fruit and flower production. End goal of the product is an increase in crop yield, robustness and sweetness. Product derived from the typical HOUSE & GARDEN stalwarts, ammonium nitrate, nitric acid and potassium hydroxide. Directions for use are to target application by adding to the nutrient solution right when the bracts loose their function. This occurs just as the first flowers are formed. For maximum results, HOUSE & GARDEN recommends using Bud-XL with high PK late bloom additive. 1L, 5L & 20L bottle sizes are available for this product.