Grow More 25# 6-30-30

What it is

Grow More 6-30-30 Standard is a 100% water-soluble powder concentrate that dissolves fully in water before it is applied. Its guaranteed analysis is 6% total nitrogen, 30% available phosphate (P₂O₅), and 30% soluble potash (K₂O). The formulation also carries EDTA chelated micronutrients; the individual micronutrient percentages are not broken out on the available label and are held below. Grow More positions the product for those special-requirement low-nitrogen situations when high amounts of phosphate and potassium are needed to firm or size fruits or vegetables. The 25 lb bag is listed by the retailer with package dimensions of 22 × 14 × 3 inches — a retailer carton/shipping field, not a maker-published specification (see Honest fit below).

Guaranteed analysis and specifications

Why choose Grow More 6-30-30 Standard

• A high-P, high-K ratio for the fruit and bloom stage. The analysis pairs 30% phosphate and 30% potash against only 6% nitrogen, matching the maker’s stated purpose: plants moving into fruiting draw more on phosphorus and potassium than on vegetative nitrogen.
• What Grow More says it is for. The maker positions it for low-nitrogen situations where high phosphate and potassium are needed to firm or size fruits or vegetables. That is Grow More’s own positioning, not an independent test result.
• Dissolves completely. It is a 100% water-soluble powder, so it leaves no residue in a spray tank or reservoir.
• EDTA chelated micronutrients. The formula carries EDTA chelated micronutrients to keep trace elements available, though the individual elements and percentages are not published on the available label and are held below.

How potassium works at the bloom and fruit stage

At the shift from vegetative to reproductive growth, a plant’s demand for phosphorus and potassium rises relative to its need for nitrogen. Phosphorus supports the plant’s energy-transfer machinery and the movement of carbohydrates toward developing fruit, while potassium is broadly involved in cell water relations and in loading sugars into storage tissue — both are general horticultural understanding, not attributed to a specific study here. On potassium specifically, the peer-reviewed literature is more precise:

• Potassium and carbohydrate storage. The peer-reviewed literature states that potassium increases the content of carbohydrates, oils, fats, and proteins and promotes the storage of sugar and starch (potassium in vegetable and fruit production, IntechOpen peer-reviewed chapter).
• Potassium and fruit-quality markers. The same source reports that increasing potassium in the nutritive solution improves the color of tomato pulp and raises its lycopene content, and that in citrus, higher leaf potassium increases the size, production, and number of fruits and raises their vitamin C content.

Grow More does not publish per-crop response data for this formulation, so no yield claim is made here — these are general mechanisms for why a high-P, high-K feed suits the fruiting stage.

Best uses

• Bloom and fruit-sizing phases. The maker’s stated purpose — to firm or size fruits or vegetables in low-nitrogen situations — makes it most relevant in late flower and early fruit development, when crops need less vegetative nitrogen.
• Field and greenhouse crops. The label publishes both per-acre field rates and greenhouse/nursery spray rates, so it suits both production contexts.
• Spray and drench programs. Because it dissolves fully, it can be used as a foliar spray or a soil/medium drench once mixed.
• High-P, high-K supplementation. When a base feed runs light on phosphate and potash during fruiting, a soluble 6-30-30 supplements those nutrients without adding proportional nitrogen.

Compatibility

Grow More does not publish a pH or EC compatibility window, or media-specific guidance, for the 6-30-30 Standard on the available label — those details are held below rather than guessed. From the available label:

• Fully soluble: the powder must be dissolved completely in water before application; undissolved powder should not be applied directly.
• Tank mixing: the maker directs adding Grow More when the tank is half full, with agitation advised. A maximum solubility per gallon is not confirmed on the available label and is held below.
• Not certified organic: it is classified as inorganic-based and not OMRI-listed, so it does not belong in a certified-organic program.

Dosing and how to use it

Grow More 6-30-30 Standard is applied as a water solution. The label rates (reproduced at sprinklerwarehouse.com) are:

1. General spray solution: 2 to 4 lbs per 100 gallons of spray solution for field and greenhouse crops.
2. Field / vegetable foliar spray: 5 to 10 lbs per acre at 7 to 10 day intervals, depending on growth need.
3. Backpack sprayer: 4 teaspoons per gallon.
4. Transplanting drench: 2 lbs per 100 gallons.
5. Always add the powder to a half-filled tank with agitation. The maximum solubility per gallon is not confirmed on the available label and is held (see Honest fit).

Grow More does not publish a hydroponic-reservoir rate for this formulation on the available label — see Honest fit below.

How it compares to a zero-nitrogen flower hardener

High-P, high-K bloom fertilizers differ in how they weight the numbers and whether they carry any nitrogen at all. This table is factual; which ratio fits a program is a grower’s judgment based on crop and stage.

Where it fits

For other bloom-stage boosters and additives, browse the nutrients & additives category. General store policies are on the about page. Related products in this catalogue:

• Grow More 25# Mendo Flower Hardener 0-37-37 — the zero-nitrogen sibling for growers who want to drop nitrogen entirely in the final bloom phase.
• Bcuzz Blossom Builder 5L — a liquid bloom stimulant for growers who prefer a liquid form factor in the same phase.