Most greenhouse crops can effectively be grown with either a water soluble fertilizer regimen or through the use of controlled release fertilizers. In general, growers tend to use a water soluble program because they feel they have better control over fertilizer needs of the crop. (They can easily reduce or increase fertilizer as needed.) For many crops, such as bedding plants in standard flats, the water soluble regimen is the better way to go because small cells do not readily lend themselves to even distribution of a controlled release fertilizer. However, with the advent of the larger cell packs, such as Jumbo Packs and the 2¼ “ liners, controlled release fertilizers can be successfully used for general bedding plant production. –Daniel Jacques
Read More in The Sun Gro’er Issue 3/2 (2005)