Jack's Professional LX Cal-Mag Fertilizer 15-5-15 (25lbs.) tools and supplies Leaves will have dark green

Leaves will have dark green veins with yellow areas between veins

It provides strong preventative control and is often used during bloom and pre-harvest stages

For more technical information

from planting through production

Jack's Professional LX Cal-Mag Fertilizer 15-5-15 (25lbs.) tools and supplies Leaves will have dark green5 5 15 Calcium + Magnesium LX Description & Key Benefits Jack's 15 5 15 is a staple in many grower's fertilizer tool box. This is a truly comprehensive fertilizer with all the macro and micro nutrients in one tank. It can be mixed with other fertilizers in the Jack's LX line, which gives this formula alot of flexibility. It contains 4% calcium and 2% magnesium (making it an ideal choice for water low in those nutrients), 80% nitrate nitrogen, and