HEAVY 16 Bud A, 1 gal

A Two-Part Flowering Base Feed Built on Four Calcium Forms, 1 Gallon (A)

Splitting a bloom-stage base nutrient into two bottles isn't just packaging — it keeps calcium and phosphate from binding together and dropping out of solution before they ever reach the root zone. HEAVY 16 Bud A and Bud B are formulated as a matched pair, together supplying bio-available phosphorus, potassium, and four distinct forms of calcium through the flowering stage.

This 1 gallon bottle covers the Bud A half of the pair — sized for a regular indoor grower running a full room — and is metered alongside Bud B during the bloom stage rather than used on its own.

Key Features & Benefits

• Part A of a two-part system — formulated to be mixed and dosed together with Bud Part B
• Bio-available phosphorus and potassium — supports bloom-stage nutrient demand for quality yields
• Four calcium forms — reduces reliance on a separate cal-mag supplement during flowering
• Works across growing systems — built for soil, coco, and hydroponic feeding programs
• 1 Gallon size — sized for a regular indoor grower running a full room

Who Should Use Bud Part A

Growers running a full HEAVY 16 program during the flowering stage, who are already using Bud Part B and need the matching Part A bottle, will use this size to complete the two-part base feed.

About HEAVY 16

HEAVY 16 was formulated by Bryce Patterson, a Cal Poly-trained horticulturist based in Signal Hill, California, around three principles: high-grade raw ingredients, complex chemistry that simplifies application, and micro-batch blending for consistency. The line is built as a streamlined system — Bud A/B and Veg A/B base nutrients (both built with four calcium forms), plus Prime, Fire, Finish, Roots, and Foliar — designed to work across soil, coco, and hydroponic systems without a long list of separate additives.

Frequently Asked Questions

How is Bud Part A different from Bud Part B?

Bud A and Bud B are split into two bottles so that calcium and phosphate-heavy compounds don't bind together and precipitate out of solution when concentrated, which is standard practice across two-part nutrient systems. Dose Part A and Part B together at the bloom-stage ratio on the HEAVY 16 feeding chart rather than running either bottle by itself.

When during the crop cycle should I start Bud A/B?

Bud A and Bud B are dosed during the flowering stage, once a plant has transitioned out of vegetative growth and bloom-stage phosphorus and potassium demand increases. Growers typically switch from HEAVY 16's Veg A/B pair to Bud A/B at that transition.

Why does this formula include four forms of calcium?

Multiple calcium forms are used so the nutrient delivers calcium across different availability windows through the feeding cycle, rather than relying on a single calcium source. This is part of why HEAVY 16's base nutrients are built to reduce the need for a separate cal-mag additive.

Can I run Bud A/B in a soil, coco, or hydroponic system?

Yes, Bud A and Bud B are formulated to work across soil, coco, and hydroponic bloom-stage feeding rather than being tied to one growing method. Start at the bloom-stage rate on the feeding chart and adjust from there based on how the crop responds.

Do I still need a separate cal-mag supplement during bloom?

In most cases no, since the four calcium forms built into Bud A and Bud B are designed to cover bloom-stage calcium and magnesium needs without a separate additive. Growers on unusually hard or soft source water may still want to monitor runoff EC and adjust.