Terra Aquatica Pro Bloom — Organic Flowering Activator & Microbial Stimulator
Best for: Growers wanting to boost flowering performance with a natural, concentrated bloom activator that works across any growing system
Our thoughts
Pro Bloom is one of those quietly effective products that punches above its weight. It's concentrated enough that a bottle lasts ages, works in hydro or soil, and the microbial activation angle actually makes sense if you understand how plants feed. No hype, just results. One we recommend a lot to growers tired of chasing yield with expensive PK boosters alone.
Terra Aquatica Pro Bloom is a concentrated organic flowering activator designed to trigger and sustain better flowering performance without the bloat of heavy mineral boosters. Unlike standard PK boosters, Pro Bloom works via multiple mechanisms — stimulating beneficial soil microbes, enhancing calcium absorption, ramping up photosynthesis, and activating your plant's natural immune response. The result is denser flower development, stronger foliage, and cleaner end-product, all at a fraction of the concentration of competitor products. At just 0.1ml per litre, a single bottle goes remarkably far, making it genuinely good value for the job it does.
How it compares
Pro Bloom sits in a distinct position within the bloom additive market. It's neither a late-stage hardener nor a straight phosphorus-potassium booster — it's an early-to-mid flowering activator built on natural formulation and microbial science.
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vs. Atami Bloombastic: Bloombastic is more mineral-dense and later-stage focused (final 4-6 weeks). Pro Bloom activates from flower initiation and uses organic ingredients at lower concentration.
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vs. Advanced Nutrients Big Bud: Big Bud is premium-positioned and heavier-dosing. Pro Bloom achieves similar results at a fraction of the per-litre cost through microbial activation rather than synthetic stimulation.
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vs. Plant Magic Boost: Plant Magic is also UK-based and growth-hormone focused. Pro Bloom prioritises photosynthesis and soil biology activation, making them complementary rather than direct competitors.
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Unique edge: The microbial activation focus means Pro Bloom improves nutrient availability system-wide, not just phosphorus uptake. Combined with the ultra-low dosage rate, you're getting economy and effectiveness in the same bottle.
Usage guidance
Timing
Apply Pro Bloom from the moment you see the first signs of flowers developing through to the start of your final flush. Don't use it during late-stage ripening — it's a mid-stage activator, not a finisher.
Root application (standard method)
Add 2ml per 10 litres of nutrient solution or water. Mix thoroughly and apply as part of your regular feed schedule. This is the most reliable delivery method and works across hydro, coco, soil, and bioponics.
Foliar spray (optional boost)
Dilute at 0.1ml per litre (roughly 2 drops per litre of water). Spray directly onto leaves, avoiding open flowers. Best applied early morning or late evening to avoid leaf burn. This accelerates nutrient uptake and can jumpstart microbial activity in the foliage itself.
Integration with your nutrient programme
Pro Bloom works alongside your regular bloom nutrients, not instead of them. Think of it as an activator that makes your base nutrition work harder. Combine with a decent base nutrient (Terra Aquatica or otherwise) for best results. If you're running a full Terra Aquatica system, Pro Bloom slots naturally into the mid-flowering phase of their feeding schedule.
Concentration advantage
Because this is super-concentrated, storage and mixing are straightforward. A 250ml bottle at 0.1ml/L dosage will treat 2,500 litres of water. A 1L bottle covers 10,000 litres. One bottle genuinely lasts a long growing cycle, which keeps costs down and shelf space clear.
Technical specifications
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Type: Organic concentrated flowering activator and biostimulant
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Composition: All-natural formula containing plant raw materials, fruit essences, and natural oils
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Manufacturer: Terra Aquatica (Fleurance, France; formerly General Hydroponics)
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Dosage (root application): 2ml per 10 litres
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Dosage (foliar spray): 0.1ml per litre (approximately 2 drops per litre)
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Available sizes: 60ml, 250ml, 500ml, 1 litre
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Application window: From first flower/fruit signs through mid-flowering; discontinue during final flush
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Application methods: Root drench, foliar spray, or integrated into nutrient tank
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System compatibility: Hydroponics, soil, coco, bioponics, and outdoor cultivation
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Key mechanisms: Microbial activation, photosynthetic enhancement, calcium uptake optimisation, plant immune stimulation
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Reported benefits: Up to 20% improved growth rates, enhanced flower density, improved foliage quality, cleaner final product (no synthetic contamination)
Who this is for
- Growers wanting to add a dedicated flowering activator to their base nutrient system without breaking the budget
- Hydroponic, coco, and soil growers looking to maximise flower development at the early-to-mid stage
- Organic and natural-product-focused cultivators who don't want synthetic plant growth regulators
- Anyone running multiple growing cycles where cost-per-application matters (the concentration keeps per-grow spend genuinely low)
- Growers familiar with or using other Terra Aquatica products who want a proven complementary additive
- Budget-conscious growers tired of expensive bloom boosters that don't justify their premium positioning
- Experienced growers who understand soil biology and microbial activation will particularly appreciate the approach here
Less suited to growers exclusively chasing maximum late-stage hardness and density — for that, a PK booster or mineral-based hardener like Bloombastic is more direct. Pro Bloom is about activating the entire flowering process earlier and more naturally.
Our take
Pro Bloom is a genuinely smart bit of kit that works because it doesn't overcomplicate things. It activates flowering through natural mechanisms — microbial life, photosynthesis, nutrient transport — rather than synthetic stimulation. At the concentration it's dosed, a bottle lasts ages, which keeps your cost-per-grow honest. The fact it works across any growing medium and integrates into existing nutrient routines makes it practical for nearly every setup.
If you're running a flowering crop and not actively using a bloom activator, this is worth picking up while clearance stock lasts. Proven Terra Aquatica pedigree, natural formula, and results that growers notice. Does exactly what it should, week in and week out.
