jacks nutrients

Jacks Boost 25lb (10-30-20)

Need a Boost of Flower Power? Our 1:3:2 major nutrient ratio has been trusted by Jack's Professional growers for over 70 years. This soluble and available nutrient combination stimulates blooming,...

Jacks Finish 25lb (7-15-30)

You've always been told to finish strong. This formula is ideally formulated for this purpose to provide your plants with a very low nitrogen, high phosphorus and very high potassium content to keep...

Jacks Part A 25lb (5 12-26)

Jack's Nutrients 5-12-26 Part A is a complete, water-soluble fertilizer that is ideal for use in hydroponics, foliar feeding, and fertigation. It is also a good choice for use on vegetables, flowers,...

Jacks Part B 25lb (16-0-0)

Jack's Calcium Nitrate B is an essential calcium supplement for hydroponics. It is a highly soluble and available source of calcium that is easy for plants to take up. Jack's Calcium Nitrate B can be...