Aptus Peakboost, 5 L

Isolate Phosphorus at Peak Bloom to Keep Your Trace Minerals Intact

Most commercial bloom boosters combine phosphorus and potassium at high levels in a single product. The problem with that approach is well-documented in plant nutrition: elevated phosphorus directly antagonizes zinc, iron, and copper uptake — blocking trace minerals that 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. This targeted P delivery allows the plant to run high phosphorus through peak bloom while keeping zinc, iron, and copper fully accessible in the root zone.

The result is a more complete mineral picture at the moments that matter most — during the same weeks when flower structure is being built and expanded.

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 — addresses the Third Pillar of Aptus Plant Philosophy by keeping high-demand minerals from competing with each other.
• Weeks 2-6 timing — applied through the critical 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/5gal at week 2 to 16 ml/5gal by week 6 to match increasing P demand.
• Sized from 1 to 20 liters — lets growers match the bottle to the scale of their garden and the length of their bloom cycle.

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.

Peakboost and Finaleboost: Coordinated Mineral Delivery

Peakboost handles the phosphorus load during weeks 2 through 6. Do not use Peakboost during weeks 7 and 8 — by week 5, begin introducing Finaleboost to handle the potassium load through the final ripening phase. Running both Peakboost and Finaleboost from weeks 5 to 6 bridges 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; 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. 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?

6 to 16 ml per 5 gallons, escalating each week from week 2 through week 6. The low end of the range is appropriate for early bloom; the high end as the plant approaches peak P demand in week 6.

Can Peakboost be used during the vegetative phase?

Yes, at 1 ml per gallon with the Aptus vegetative feeding chart to address purple stems caused by phosphorus deficiency — but this is an occasional correction, not a standard part of the veg routine.