This fertilizer was developed by Hybridizer, Ken Landon, Director of the International Waterlily Collection in San Angelo, Texas. He has over 50 species and 2000 waterlilies under his direction. Landon Fertilizer is the ONLY fertilizer he uses. It is the ONLY fertilizer we endorse at PondMegaStore. Landon Fertilizer gets your plants off to a rapid start. Follow dosing recommendations on package. We recommend 1/2 the dosage if the plants are very young or the water is 75 degrees or warmer.