Aptus Bloomboost, 1 L

Push Flower Size, Fiber Mass, and Quality Through the Full Reproductive Phase, 1 L

Potassium, sulfur, and boron each play a specific role during the fruiting and flowering phases, but many standard bloom formulas don't supply them in the precise ratios or at the specific times the plant needs them. Bloomboost delivers these three elements together throughout the reproductive cycle, from week 2 through week 8 of flowering, at dosages that escalate incrementally to match the plant's increasing demand as it develops.

Bloomboost ships in a 1 L container, sized for single-room growers running the full week 2 through week 8 schedule.

Key Features & Benefits

• Potassium for flower bulk and vigor — drives cell expansion and overall flower development throughout the reproductive phase.
• Sulfur for quality and aromatic complexity — supports the metabolic pathways behind flavor and aroma development in the final product.
• Boron for fruit and flower set — plays a role in the formation and structure of fruit and flowers from the start of the reproductive phase.
• Week 2 through week 8 timeline — applied throughout the entire flowering period with escalating dosage as the plant develops.
• Escalating dosage schedule — starts at 4 ml per 5 gallons from week 2 and increases each week, with up to 1 ml per 2.5 liters for increased effect.

Who Should Use Aptus Bloomboost

Growers running the full flowering phase who want potassium, sulfur, and boron delivered in precise, escalating amounts rather than a fixed-ratio bloom supplement, with the 1 L size matched to the scale of the garden.

About Aptus Bloomboost

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. Bloomboost runs alongside Peakboost (weeks 2-6) and Finaleboost (weeks 5-8) throughout the flowering cycle. While Peakboost isolates phosphorus and Finaleboost isolates potassium for end-ripening, Bloomboost delivers the K-S-B stack continuously from week 2 through week 8 to support flower development at every stage.

Frequently Asked Questions

What makes potassium, sulfur, and boron important together in flower?

Potassium drives cell expansion and flower bulk, sulfur supports quality and aromatic development, and boron is important for fruit and flower set. Together they address the structural and qualitative demands of the reproductive phase.

When does Bloomboost overlap with Peakboost in the Aptus program?

Bloomboost runs from week 2 through week 8, and Peakboost covers weeks 2 through 6. They overlap during those early and middle bloom weeks, with each product targeting distinct mineral categories: Bloomboost on K-S-B and Peakboost on isolated phosphorus.

How should I dose Bloomboost through the flowering cycle?

Start at 4 ml per 5 gallons from week 2 and increase each week, up to 8 ml per 5 gallons by week 8. For increased effect, use up to 1 ml per 2.5 liters, but confirm your active PPM allows it before increasing.

Can I use Bloomboost without the rest of the Aptus line?

Yes, Bloomboost can be added to any bloom feeding program as a targeted K-S-B supplement, though it's designed to work alongside the full Aptus system including Peakboost and Finaleboost. Running it on its own still delivers the same week-by-week potassium, sulfur, and boron schedule.