GreenPlanet Karbo Boost (Bulker + Finisher)

What is GreenPlanet Karbo Boost used for?

Karbo Boost is a powdered carbohydrate supplement that feeds beneficial microbes in the root zone. It helps improve nutrient cycling, root health, and overall plant performance during flowering and finishing. It’s not a base nutrient or PK booster—it’s a microbial support additive.

Can I use Karbo Boost in soil, coco, and hydro?

Yes. Karbo Boost works in all grow media—soil, coco, hydroponics (DWC, NFT, drip). Just be extra mindful of cleanliness in recirculating systems to avoid buildup or biofilm issues.

When should I use Karbo Boost, and how often?

Use Karbo Boost throughout the flowering phase. Many growers start in early bloom and run it until harvest. In coco or hydro, it's often used every watering; in soil, some apply it 1–2 times a week or as needed.

What’s the correct dose and how do I mix Karbo Boost?

The standard dose is 0.3 g per litre (e.g., 3 g per 10 L). Pre-mix it in warm water if needed to avoid clumps. Add it early in your mixing order—after water and silica (if used), before nutrients and pH adjustments.

Can Karbo Boost cause clogs or slime in reservoirs?

If poorly mixed or left to sit in warm, unclean tanks, yes—it can contribute to buildup. Always dissolve fully, maintain system hygiene, and keep your reservoir cool and oxygenated.

Does Karbo Boost affect pH or EC?

It’s mostly pH neutral and won’t swing pH much, but always check after mixing. It can slightly raise EC, though not dramatically—still worth monitoring in tight feed schedules.

Can I use Karbo Boost with other supplements?

Yes. It pairs well with PK boosters, Cal-Mag, enzymes, silica, beneficial bacteria, and mycorrhizae. Just don’t max out everything at once—balance and simplicity help prevent issues.

Does Karbo Boost help nutrient uptake, yield, or flavour?

Indirectly, yes. Healthier microbial activity supports better nutrient conversion and uptake. Many growers use it to support denser flowers and stronger aroma/flavour late in bloom.

Will Karbo Boost fix plant deficiencies?

No—it doesn't contain essential minerals. It supports recovery when the root zone is struggling, but it won’t replace missing calcium, magnesium, or nitrogen. Fix the core issue first.

Is Karbo Boost still helpful without microbes?

You’ll see the biggest benefit with microbes present, but even without active inoculants, some growers report improved finish quality. It shines when paired with a living root zone.

Can I use Karbo Boost until harvest? Do I need to flush?

Yes, many growers use it through to harvest. It’s not salt-heavy, so it doesn’t usually interfere with flushing. If you flush or taper nutrients at the end, Karbo Boost can remain as a gentle finisher.

Is Karbo Boost safe for edible crops?

Yes. It’s often used in fruiting vegetables, herbs, and other edibles. Just follow good feed hygiene and avoid overdoing mineral nutrients alongside it.

Will Karbo Boost attract pests or cause mould?

Not directly. Fungus gnats thrive in damp media, not just carbs. Mould risk is more about humidity and airflow. Keep your grow environment clean and balanced to avoid issues.

Is Karbo Boost organic or suitable for organic-style grows?

It’s a carbohydrate additive but not always certified organic. Many organic-style growers use it to feed microbes, but check with your certification body if strict compliance is needed.

What sizes does Karbo Boost come in, and how long does it last?

It’s available in 600g, 1kg, and 2.5kg. A little goes a long way—600g lasts small grows a long time. Store sealed, cool, and dry to prevent clumping. If it clumps from humidity, it may still work—just mix thoroughly.