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Greenbat

Greenbat bat guano for powerful organic flowering

Boost phosphorus levels naturally during the flowering stage with Greenbat bat guano. This 100 % organic fertilizer delivers high concentrations of phosphorus alongside humic acids, trace elements and beneficial microbes that synthetic PK boosters simply cannot match — resulting in heavier flowers with richer flavour and aroma.

Choose powder for immediate uptake through your watering solution, or granules for gradual nutrient release over four to six weeks. Available in 1, 3 and 5 kg bags, designed for soil and coco grows — not suitable for hydroponics. Fast delivery across Belgium.

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Greenbat Granule 1 kg

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Greenbat Granule 3 kg

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Greenbat Powder 5kg organic guano nitrogen phosphorus large | Greenbat

Greenbat Pouder 5 kg

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Our Greenbat bat guano selection

Greenbat is 100 % natural bat guano with a high phosphorus content and a rich mix of trace elements. This organic bloom booster stimulates flower formation while feeding the growing medium with humic acids and beneficial microbes. At Plant & Flower, your Belgian grow shop since 2011, we stock Greenbat in two textures — granules for gradual release and powder for fast action — suitable for any growing style on soil or coco.

A complete organic bloom booster

Unlike synthetic PK boosters that only deliver phosphorus and potassium in mineral salt form, bat guano is a complete soil amendment: it feeds the plant and the substrate simultaneously. The caves where guano is harvested have housed bat colonies for decades, creating a microbial ecosystem that gradually converts droppings into a fertilizer rich in stabilised organic matter. The result is bioavailable phosphorus accompanied by micronutrients (calcium, magnesium, iron, zinc, manganese) and beneficial bacteria that activate the rhizosphere. This completeness explains why a single guano application can replace several synthetic boosters while also improving soil structure over the long term. For outdoor growing, Greenbat is particularly useful: a single spring application often covers the entire season, whereas liquid fertilizers require weekly dosing. The product keeps for several years in dry storage in its original packaging — a practical advantage for growers planning multiple cycles in advance.

Technical characteristics

Composition: 100 % organic bat guano, high phosphorus, low nitrogen
Granules: gradual release over 4-6 weeks, mix in when potting
Powder: fast action, dissolve in water or mix into substrate
Trace elements: humic acids, micronutrients (Ca, Mg, Fe), active microorganisms
Substrate compatibility: soil and coco only — not for hydroponics
Caution: not for seedlings or young cuttings (concentration too high)
Origin: animal product — not vegan (different from Biotabs or BioCanna)

Dosage and use

As a soil amendment when potting up, use roughly 100 to 200 g per 10 litres of medium — mix it into the top layer where active roots develop. For liquid application, dissolve a tablespoon of Greenbat powder in 5 litres of lukewarm water, let it sit for an hour and filter before watering. Apply mainly at the start of flowering for maximum effect on bud formation — one to two applications typically suffice for a complete cycle.

The 1 kg granules are perfect for a first grow or small garden. The 3 kg format covers multiple pots or a complete outdoor season. Greenbat is particularly popular with outdoor growers looking for an organic base fertilizer — one or two applications per season, without needing weekly dosing. For large areas or professional gardeners, the 5 kg powder offers the lowest cost per gram. Guano can also be brewed into a compost tea: combine with molasses and aerate for 24 hours to produce a biologically active liquid that extra-stimulates soil life. This technique is especially valuable for living-soil grows where you actively feed the microbiome.

FAQ - Frequently asked questions about Greenbat

What is the difference between Greenbat powder and granules?

Powder acts fast because it dissolves in water and is taken up directly by the roots. Granules release nutrients gradually over several weeks, making them better suited as a base amendment when potting, transplanting or outdoor growing.

Can Greenbat be used in hydroponic systems?

It is not recommended. Guano is an organic fertilizer containing insoluble particles that can clog pumps and drippers. It is designed for soil or coco grows, where beneficial microorganisms in the medium break down the nutrients into plant-available forms.

When in the cycle should I apply Greenbat?

Greenbat is optimal at the start of flowering, when the plant's phosphorus demand increases. Avoid applying to seedlings or young cuttings — the phosphorus concentration is too high for developing roots. One application at potting (granules) plus a second mid-flowering (powder) typically covers a complete cycle.

Is bat guano vegan?

No, it is an animal-derived product — natural droppings collected from caves. For a 100 % plant-based approach, consider Biotabs (organic tablets with plant-based sources) or fully plant-based liquid feeding lines like BioCanna.

Do I need to adjust pH or EC with Greenbat?

No, organic fertilizers in soil cultivation typically do not require pH or EC adjustment. The substrate and microbial life naturally buffer variations. Just make sure your watering water falls between 6.0 and 7.0 for optimal nutrient uptake.

Order your Greenbat at Plant & Flower for fast delivery throughout Belgium. Our team gladly advises on integrating guano into your feeding programme, whether for indoor or outdoor cultivation.