These pre-measured fertilizer cartridges deliver nutrients directly to tree and shrub roots when used with a Ross Root Feeder. No mixing or measuring required.

• 36 cartridges per pack (1.5 lb total)
• 25-10-10 NPK formula
• High nitrogen for vigorous growth
• Delivers nutrients directly to root zone
• For use with Ross Root Feeders
• Apply in early spring and late summer
• No mixing or measuring needed
• Made in USA

Application: One cartridge per foot of tree height, with feeder inserted 12" deep.