PowderFeeding Long Flowering

PowderFeeding Long Flowering — The One-Bag Nutrient Solution for Sativa Growers

PowderFeeding Long Flowering is a complete mineral fertilizer from Greenhouse Seeds, engineered specifically for cannabis strains with 60% or more Sativa genetics. One powder, mixed with water, delivers every macro and micronutrient a long-flowering plant demands from seedling through harvest — no bottles, no complicated feed charts, no guesswork. The N-P-K-Mg ratio of 18-12-18-(1.2) is calibrated for the extended metabolic cycle that Sativa-dominant strains run on, keeping nitrogen available deep into flowering when most single-part feeds fall short. You can buy PowderFeeding Long Flowering at Azarius in a 125 g bag or a full box of 50 bags.

Why Sativa Strains Need a Different Feed

Sativa-dominant genetics metabolise nitrogen throughout their entire flowering cycle, unlike Indica strains that taper off after week 7 or 8. Where an Indica might wrap up in 7–8 weeks, a proper Sativa can stretch to 12, 14, even 16 weeks of flowering. That's weeks of additional nutrient demand, and a feed designed for short-flowering hybrids simply runs out of steam. Plants start cannibalising fan leaves, bud development stalls, and you end up with airy, underwhelming flowers after months of patience.

PowderFeeding Long Flowering addresses this with a balanced 18-12-18 ratio. The nitrogen sits at 18% — split between 10% nitrate nitrogen (immediately available) and 8% ammoniacal nitrogen (slower release). That split matters because it means your Sativa keeps getting a steady drip of N even in late flower, preventing the premature yellowing and leaf drop that plagues long-flowering strains on standard bloom feeds. The 12% phosphorus contributes to flower formation without the excessive P that can lock out calcium and magnesium, while the 18% potassium drives resin production and cell wall strength right through to harvest. According to data published by the European Monitoring Centre for Drugs and Drug Addiction (EMCDDA), Sativa-dominant cultivars have seen a marked increase in popularity across European markets, which tracks with the growing demand we see for long-flowering nutrient formulas.

From Our Counter: We've had growers come into the shop frustrated after losing the last three weeks of a Haze run to deficiency. Nine times out of ten, their bloom feed was designed for an 8-week Indica. Switching to a long-flowering formula is the single change that makes the biggest difference for Sativa growers — bigger than any additive or booster. One regular customer switched from a three-part liquid system to PowderFeeding Long Flowering mid-grow and told us the difference in leaf colour alone was visible within five days.

Full Nutrient Composition

PowderFeeding Long Flowering contains 10 declared nutrients: four macroelements and six chelated trace minerals, all water-soluble and immediately available after dissolving.

That's 6 trace elements on top of the primary N-P-K and magnesium. Iron at 0.1% is the standout — iron deficiency shows up as interveinal chlorosis on new growth, and it's annoyingly common in coco and hydro setups where pH drifts above 6.5. Having it baked into the powder means one less bottle of chelated iron on the shelf.

Specifications

The table below covers every technical detail you need before you order PowderFeeding Long Flowering for your setup.

Why You Actually Need a Long-Flowering Formula

A standard bloom fertilizer assumes flowering wraps up in 8 weeks, which starves Sativa-dominant strains during their most productive final phase. Here's the honest version: you can grow a Sativa on a standard bloom feed. Plants are resilient. But "surviving" and "thriving" are different outcomes when you've spent 4 months on a single run. The difference shows up in the final 3–4 weeks — exactly when a short-flowering formula assumes the plant is wrapping up. Your Haze or Thai-cross is still pushing out new pistils, still stacking calyxes, still demanding nitrogen and potassium. A standard bloom feed has already shifted to a heavy P-K finish ratio that starves the plant of what it actually needs.

The result? Premature leaf drop, reduced resin coverage, and buds that look done but aren't dense. We've seen growers blame genetics for what was actually a feeding problem. PowderFeeding Long Flowering keeps the N at 18% — unusually high for a flowering feed — precisely because Sativas metabolise nitrogen throughout their entire cycle. The phosphorus stays moderate at 12% rather than spiking to 20%+ like many PK boosters, which avoids the lockout cascade that hits calcium and magnesium when P gets too aggressive.

Honest limitation: This is a mineral salt fertilizer, not an organic line. If you're committed to a fully organic soil food web approach — living soil, compost teas, mycorrhizal networks — this is not the product for you, and we'll say that plainly. But if you want predictable, repeatable results with precise control over what your plants receive, mineral powder feeding is hard to beat. No bottles going off in the cupboard, no measuring five different liquids, no pH swings from organic decomposition. Just powder, water, stir, done.

How to Use PowderFeeding Long Flowering

Dissolve the powder in room-temperature water, adjust pH, and water your plants — the entire mixing process takes under two minutes.

1. Measure your water. Fill your reservoir or watering can with 10 litres of water at room temperature (18–22°C is the sweet spot for dissolving).
2. Weigh the powder. Use the included 10 g dosage spoon or a digital scale. For seedlings and young plants, use 2.5–5.0 g per 10 litres. For vegetative growth and flowering, use the full 10 g per 10 litres.
3. Dissolve completely. Add the powder to the water and stir for 30–60 seconds until fully dissolved. No residue should remain — if it does, your water is too cold.
4. Check and adjust pH. After dissolving, measure the pH. For soil, aim for 6.0–6.5. For coco and hydro, 5.5–6.0. The powder will shift your pH, so always check after mixing, not before.
5. Water as normal. Apply the solution to your plants at their regular watering schedule. In soil, water until you see 10–20% runoff to prevent salt buildup. In hydro or aero, simply add the mixed solution to your reservoir.
6. Store the dry powder in a sealed bag or container away from moisture. Powder that clumps from humidity still works, but it's harder to measure accurately.

From Our Counter: One tip from the shop floor — start at the lower end of the dosage range (7–8 g per 10 litres) for the first week or two, then ramp up to the full 10 g. Sativas are generally more sensitive to overfeeding than Indicas, and tip burn on those narrow leaves shows up fast. Better to underfeed slightly and increase than to chase a lockout with flush after flush. We had a customer bring in a photo of his Super Silver Haze with perfect green leaves at week 14 — he credited starting low and ramping up slowly.

PowderFeeding Long Flowering vs. Hybrids Formula

PowderFeeding Long Flowering uses an 18-12-18 N-P-K ratio with higher sustained nitrogen, while PowderFeeding Hybrids shifts toward phosphorus and potassium earlier to match faster-finishing genetics. The key difference is nitrogen content — the Long Flowering formula keeps nitrogen higher for the extended cycle, while the Hybrids version shifts the ratio toward phosphorus and potassium earlier, matching the faster finish of 50/50 or Indica-leaning strains. If your strain is listed as 60%+ Sativa, reach for Long Flowering. If it's a balanced hybrid or Indica-dominant, the Hybrids formula is the better match. Using the wrong one won't kill your plants, but you'll leave yield and quality on the table — and after 12+ weeks of flowering, that's a frustrating place to be. Both products are available to buy in the Azarius grow shop, and you can also browse the full PowderFeeding range in the plant food and fertilizer category.

Frequently Asked Questions

Last updated: April 2026