Jack's Nutrients 10-30-20 Bloom Fertilizer | 25lb

1:3:2 Bloom and Fruit-Set Fertilizer, 10-30-20, 25lb

Bloom and fruit set both depend on the plant having enough phosphorus and potassium at the right moment in its cycle. Jack's Nutrients 10-30-20 Bloom Fertilizer promotes root growth plus flower and fruit development, with a 1:3:2 major nutrient ratio combination trusted by professional growers for over 70 years.

25lb size, 10-30-20 bloom and fruit-set formula.

Key Features & Benefits

• 10-30-20 ratio, a 1:3:2 nutrient combination — promotes blooming for enhanced flower buds and fruit sets.
• Promotes root growth plus flower and fruit development — supports both structural and reproductive growth stages.
• Trusted by professional growers for over 70 years — long-standing formula within the JR Peters product history.
• Sold as part of the CEA-focused Jack's Nutrients brand — sized for greenhouse and indoor controlled-environment production.

Who Should Use Jack's Nutrients Bloom Fertilizer

This fits greenhouse and controlled environment growers looking to promote flower bud and fruit set alongside continued root development.

About the 1:3:2 Bloom Ratio

JR Peters' 10-30-20 Bloom Fertilizer uses a 1:3:2 major nutrient ratio, a combination the company states has been proven and trusted by professional growers for over 70 years to promote blooming and fruit set.

Frequently Asked Questions

What does the 1:3:2 ratio in this formula do?

This 1:3:2 major nutrient ratio combination promotes blooming, resulting in enhanced flower buds and fruit sets, alongside continued root growth. That combination of root support and bloom promotion is what distinguishes it from a formula focused on bloom alone.

How long has this formula been used by growers?

JR Peters describes this formula as proven and trusted by professional growers for over 70 years, giving it a long track record within their product history. That history is specific to this 10-30-20 ratio rather than the Jack's Nutrients line as a whole.

What growing environments is this formula suited for?

Growers running a greenhouse or indoor controlled-environment operation are the primary audience for this bloom formula, in keeping with the rest of the Jack's Nutrients CEA lineup. It isn't marketed toward open-field production.

What size is this listing?

This is the 25lb size option. Both sizes share the same 10-30-20 formula, so the choice comes down to how much product a grower needs on hand.