PGR Additives
PGR Additives for Heavy Stackers
🧱 Cut the stretch and stack like a pro.
What Are PGR Additives?
Plant Growth Regulators (PGRs) are serious tools for serious growers. These additives are used to suppress vertical growth and encourage ultra-compact, rock-hard flower development. They’re not the natural alternatives - these are full-strength regulators best suited for ornamental or non-consumption crops.
✅ Stops vertical stretch completely
✅ Maximises flower density and weight
✅ Used in late veg through early flower for control
⚠️ Not intended for crops grown for human consumption. Use with extreme caution.
Want clean alternatives? 🌱 Check out Organic Nutrients for safe and bio-based feeds. **
Want better airflow too? 🌬️ Pair with a Root Booster for strong underground structure.
Welcome to The Grow Guys
We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.
FAQs
Calculated at checkout by weight and destination. Free shipping over $499*.
Order by 2pm and it ships the same business day from Invermay, Tasmania.
500+ products across 40+ brands, every one filtered through 14 years of real growing experience. Shipping Australia-wide.
30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.
Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.