Our eBay Store Contact Us Add to Favorite Sellers Algoflash All Natural Mineral Based Fertilizers for Flowers, Vegetables, Plants Algoflash Slow Release 6-month Basacote Fertilizer for Roses and Flowering Shrubs With magnesium, sulphur and micro-nutrients, NPK 15-9-14. One teaspoon of coated Algoflash pellets, feeds and strengthens newly planted and established plants throughout a 6-month growing season. 28-oz. Ready to Use. Product Details Basacote Algoflash 6-month Slow Release Fertilizer For Roses and Flowering Shrubs Magnesium, sulphur and micro-nutrients NPK 15-9-14 Single Box Magnesium, sulphur and micro-nutrients