| FERTILIZER MATH Jim Hawes stated in his article,Fertilizing Hostas: �Since I have a very large hosta garden, it is important to me that my fertilizer applications are economic, technically appropriate, produce good results and are efficient in terms of outlay of cash and labor� I use a granular 19-19-19, such as a corn farmer would use... I apply it at a rate that approximates the working level rate of application of nitrogen (approx. 120 to 150 pounds per acre). I have used these guidelines over a period of 50 years � uniformly broadcasting by hand the granular 19-19-19 or similar formulations at appropriate rates and at the appropriate times in the year. For my hostas I apply only one broadcast in March before the snow melts on my hosta beds.� 120LB RATE: (120lbs N)/ (acre x (43560 ft�/acre)) = 2.75 lbs N/ 1000 ft� For 10-10-10 ferts: (10%N): (2.75 lbs N/ 1000 ft�) x (1 lbs fert/ .10 lb N) = 27.5 lbs fert/ 1000 ft� = 2.75 lbs fert/ 100 ft� For 19-19-19 ferts: (19% N) (2.75 lbs N/ 1000 ft�) x (1 lbs fert/ .19 lb N) = 14.5 lbs fert/ 1000 ft� = 1.45 lbs fert/ 100 ft� 150LB RATE: (150lbs N)/ (acre x (43560 ft�/acre)) = 3.44 lbs N/ 1000 ft� For 10-10-10 ferts: (10%N): (3.44 lbs N/ 1000 ft�) x (1 lbs fert/ .10 lb N) = 34.4lbs fert/ 1000 ft� = 3.44 lbs fert/ 100 ft� For 19-19-19 ferts: (19% N) (3.44 lbs N/ 1000 ft�) x (1 lbs fert/ .19 lb N) = 18.1 lbs fert/ 1000 ft� = 1.81 lbs fert/ 100 ft� |