15-0-15 Dark Weather
Product #77190
description & key benefits

Jack's Dark Weather formula is one of our most popular when growers are looking for a way to increase calcium into their fertility program.  An ideal product for growers who want a non-phosphorus, high nitrate product with calcium. Alternate with 20-10-20 Peat-Lite or use as a "finisher" for flowering plants like poinsettias. This formula has the traditional micronutrient levels needed for general production.

for use on

All Plants

growers who want

No Phosphorus, highly basic formula

with Ca

mixing instructions

Chart displays the amount of dry fertilizer (oz.) to add to each gallon of water to make a concentrated solution. Please check your injector setting before use.

Limit of Solubility = 7 lbs per gallon

Important Notes:

E.C. value is the best method to determine fertilizer strength. Fertilizer appearance may vary in color due to variation in raw material size and tracer dye distribution upon the particles in the bag. In solution, color will remain consistent.

For best results, use warm water to dissolve product. Jack's fertilizers are made with 100% soluble raw materials that will form a true solution. Some raw materials are slower to dissolve than others. Keep stock tank covered to reduce light and debris inputs. 


JR Peters, Inc. 

6656 Grant Way,
Allentown, PA, 18106
Toll Free: 866-522-5752
email: info@jrpeters.com


Having trouble?  That’s where we shine.  The lab and manufacturing facility at JR Peters is literally within steps of all of our staff.  We all work together to solve our growers problems and produce the highest quality products.  Our turnaround time for samples is about 3 business days - that means we can get you real answers if and when you run into bumps along the road.