Aptus Peakboost, 5 L

Isolate Phosphorus at Peak Bloom to Keep Your Trace Minerals Intact, 5 L

Most commercial bloom boosters combine phosphorus and potassium at high levels in a single product, and elevated phosphorus directly antagonizes zinc, iron, and copper uptake, blocking trace minerals the plant needs throughout the bloom cycle. Peakboost isolates plant-available phosphorus in its own product, removing potassium from the equation entirely during weeks 2 through 6, so the plant can run high phosphorus through peak bloom while keeping zinc, iron, and copper fully accessible in the root zone.

Peakboost ships in a 5 L container, sized for multi-room growers running the weeks 2-6 phosphorus schedule.

Key Features & Benefits

• Isolated plant-available phosphorus — applies concentrated P without potassium, removing the antagonism that blocks trace mineral uptake in standard P-K bloom boosters.
• Zinc, iron, and copper preservation — keeping potassium out of the P-peak equation means these trace minerals stay accessible throughout weeks 2-6.
• Mineral antagonism prevention — keeps high-demand minerals from competing with each other during peak bloom.
• Weeks 2-6 timing — applied through the flower-building phase, then discontinued in weeks 7 and 8 when Finaleboost takes over.
• Dosage 6-16 ml per 5 gallons — escalates from 6 ml per 5 gal at week 2 to 16 ml per 5 gal by week 6 to match increasing P demand.

Who Should Use Aptus Peakboost

Growers in the peak-bloom phase who want to run elevated phosphorus without the mineral antagonism caused by standard P-K bloom boosters, preserving zinc, iron, and copper availability through weeks 2 to 6 of flower, with the 5 L size matched to garden scale.

About Aptus Peakboost

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. Peakboost handles the phosphorus load during weeks 2 through 6; by week 5, growers begin introducing Finaleboost to handle the potassium load through final ripening, running both Peakboost and Finaleboost from weeks 5 to 6 to bridge the transition before Peakboost is dropped entirely.

Frequently Asked Questions

Why must I stop using Peakboost in weeks 7 and 8?

By week 7, the plant's phosphorus demand decreases while potassium demand peaks for ripening. Continuing Peakboost at that stage would create unnecessary P loading, so Finaleboost handles the potassium push through the final two weeks alone.

How does Peakboost differ from standard P-K bloom boosters?

Standard P-K products combine phosphorus and potassium in a fixed ratio, and high P antagonizes zinc, iron, and copper uptake. Peakboost isolates P entirely, so trace minerals stay accessible while running elevated phosphorus.

What dosage rate does Peakboost use?

It runs 6 to 16 ml per 5 gallons, escalating each week from week 2 through week 6. The low end of the range suits early bloom, while the high end matches the plant's approach to peak P demand in week 6.

Can Peakboost be used during the vegetative phase?

Yes, at 1 ml per gallon alongside the Aptus vegetative feeding chart to address purple stems caused by phosphorus deficiency. This is an occasional correction rather than a standard part of the veg routine.