Specialty Gardening: Container Soils: Water Movement and Retention II, 1 by FertiSorb

FertiSorb wrote:
Al: Attached is a tissue analysis taken from a sample of 20,000 geraniums grown several years ago using a 12-12-12 mixture of a dry granular product applied at a rate of 5 pounds per cubic yard, single application, no subsequent feeding. The analysis was taken after 4 weeks' growth from unrooted cuttings. If my math is correct, that translates into an application of N, P and K of about 272 grams throughout the growing media. By the time I visited the greenhouse in early February, the plants were shooting buds like mad. I'll not dispute any of your assertions as to the proper levels of nutrient needed for healthy plant development, because you're absolutely on the money. My point is that by delivering nutrient in the most efficient means possible, you're capable of growing an outstanding plant (in this case, geranium) with a minimum of actual nutrient being delivered. This gives the grower much wider latitude to supplement at a much lower overall rate without over-application if amendment of the feeding is needed. I have trials on tomato and petunia which offer similar findings, but I thought you 'd be interested in seeing the geranium results attached.