Description
Top Booster is H&G’s high-phosphorus bloom stimulator — it’s used to push flower density and compactness during the peak production phase of flowering, typically from week 4 to week 7 depending on variety and cycle length. The elevated phosphorus supports the energy transfer systems active during reproductive development, and the product’s concentrated formulation means relatively small doses produce a meaningful shift in the nutrient ratio reaching the root zone.
Use alongside your base bloom nutrient at the recommended dose — Top Booster adds to your feed rather than replacing base nutrition. Check combined EC before applying; if you’re already running at your target EC with base nutrients, you may need to reduce the base slightly when adding Top Booster to stay within range. The 1-litre bottle suits regular use across multiple harvests.
House & Garden’s range is built around layering specific additives onto a base feeding programme rather than replacing it, and Top Booster is one of the more commonly used late-vegetative-into-flowering additions for growers wanting to influence flower density without switching their entire nutrient line. Because it’s concentrated, dosing accuracy matters more than with a more dilute product — use a proper measuring syringe rather than estimating, since small dosing errors have a proportionally larger effect on the final nutrient solution with a concentrated additive than with a less potent product. Keep a simple log of when additives are introduced each cycle if you’re running multiple House & Garden products together, since tracking what’s been added and when makes it far easier to diagnose any issue that arises partway through flowering, rather than trying to reconstruct the feeding history from memory once a problem shows up.
Store bottles upright in a cool, dark location away from direct sunlight between uses, and always measure with a dedicated syringe rather than a shared one used for other concentrates, since cross-contamination between different nutrient lines can affect the accuracy of future doses from either bottle.
At a glance:
- High-phosphorus bloom stimulator
- Used weeks 4–7 of flowering (variety-dependent)
- Adds to, rather than replaces, base bloom nutrient
- Concentrated — dose accurately with a syringe
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