Aptus StartBoost Humic Acid Plant Additive, 5 L

Help Roots Grab Hold of Every Nutrient You're Already Feeding, 5 L

A feeding program is only as effective as the roots' ability to take up what's in it, and early in a cycle, that uptake capacity is exactly what's still developing. StartBoost, a foundation product of the Aptus Premium Collection alongside Fasilitor, is built from humic acid derived from leonardite, a natural source mined from the earth and filled with long-chain carbon-based molecules that chelate elements from the soil.

StartBoost ships in a 5 L container, matched to multi-room growers dosing through a full vegetative phase.

Key Features & Benefits

• Humic acid derived from leonardite — supplies a natural, earth-mined source of long-chain carbon-based molecules.
• Chelates elements from the soil — can increase the uptake of micronutrients already present in your feeding program.
• Primary vegetative-phase additive — is the main Aptus additive used through vegetative growth and the first week of flowering.
• Doubles as a seedling and clone drench — can be used alone at a lighter rate for dedicated seedling or rooted-clone applications.
• Works as a transplant root dip — diluted at 1:100, it supports rooted cuttings being transplanted into new media.

Who Should Use Aptus StartBoost

Growers who want to support root development and micronutrient uptake during the vegetative phase, whether feeding a reservoir, drenching seedlings and clones, or dipping roots before transplanting, with the 5 L size matched to that dosing schedule.

About Aptus StartBoost

Aptus Plant Tech began developing soil- and plant-science-based nutrient research in the Netherlands in the 1990s and has grown into a hydroponic nutrient supplier distributing across Europe, North America, and Australia. StartBoost is a foundation product of the Aptus Premium Collection alongside Fasilitor, used through the entire vegetative phase and week 1 of flowering at 1 ml per gallon, then discontinued as the plant's nutrient needs shift toward bloom.

Frequently Asked Questions

When should I stop using StartBoost?

Aptus recommends using StartBoost through the entire vegetative phase and into week 1 of flowering, then discontinuing it as the plant's nutrient needs shift toward bloom. Continuing past that point isn't harmful, but it isn't part of the standard Aptus schedule either.

Can StartBoost be used as a clone or seedling drench?

Yes, used alone at 1 ml per liter, it can serve as a dedicated drench for seedlings or rooted clones. This is a lighter rate than the standard reservoir dose, meant specifically for young, developing root systems.

How do I use StartBoost for transplanting?

Dilute it at a 1:100 ratio (10 ml per liter) for a root-dip solution when transplanting rooted cuttings into new media. Dipping roots briefly before planting helps introduce the chelating humic acid right at the root zone.

Does StartBoost replace a base nutrient program?

No, it's a foundation additive that complements a base feeding program, supporting root development and micronutrient uptake during the vegetative phase. It's meant to run alongside your existing nutrients, not in place of them.