Plagron Sugar Royal: terpene boost for tastier flowers
Plagron Sugar Royal is a natural flowering enhancer that pushes your plants to produce stickier, more aromatic flowers packed with terpenes. Add it to your existing feeding regime from the second week of growth right through to harvest, and your nose will thank you when chop day comes around.
Why Sugar Royal earns a spot in your feed schedule
Most growers nail the structure of the plant but end up with flowers that smell like wet hay. Terpenes — the volatile compounds responsible for scent and flavour — are the first casualty when a plant is stressed, underfed, or running on a stripped-back base nutrient. Sugar Royal is built specifically to fix that gap.
The formula combines essential amino acids that improve plant vigour, 9% nitrogen to keep growth ticking over during the stretch and bulk phases, and a resin-stimulating compound that pushes the plant to lay down a thicker layer of sticky trichomes. That resin layer is where terpenes, flavonoids, and essential oils live, so a denser coating means stronger smell, deeper colour, and more flavour at the end. The amino acids also help your plants ride out heat waves, cold snaps, and the odd missed watering — three things that wreck a terpene profile faster than anything else.
One honest limitation: this is for peat and coco growers only. If you're running hydro, DWC, or any recirculating water culture system, Sugar Royal isn't the right tool — Plagron's hydro-specific line covers that side of the shop floor.
How Plagron Sugar Royal compares to other flowering boosters
| Booster | Main role | Best for | Compatible substrate |
|---|---|---|---|
| Plagron Sugar Royal | Terpene & aroma enhancer | Smell, flavour, resin | Peat, coco |
| Plagron Green Sensation | All-in-one bloom booster | Density, weight, ripening | All substrates |
| Plagron Pure Zym | Enzymatic root cleaner | Substrate health | All substrates |
| Plagron Power Roots | Root stimulator | Early growth, transplants | All substrates |
Sugar Royal isn't trying to replace a bloom booster — it's a flavour specialist. Run it alongside Green Sensation and you get the best of both: bigger flowers and a sharper terpene profile.
Specifications
| Brand | Plagron |
| Product | Sugar Royal |
| Volume | 100 ml |
| Nitrogen content | 9% |
| Active ingredients | Amino acids, resin stimulator, nitrogen |
| Max dosage | 1 ml per 1 litre water |
| Application window | Week 2 of growth → end of flowering |
| Compatible substrates | Peat, coco |
| Not suitable for | Hydroponic systems |
| SKU | HS1880 |
How to use Plagron Sugar Royal
- Shake the bottle well before each use — the actives settle.
- Measure a maximum of 1 ml per 1 litre of water. Going higher won't give you more flavour, just more salt buildup.
- Add Sugar Royal to your existing nutrient mix from week 2 of the growth phase onwards.
- Use the solution every time you water, all the way up to harvest.
- Stick to your normal flush schedule in the final 1–2 weeks if that's your preference.
Pair Sugar Royal with Plagron Green Sensation for the full Plagron flowering stack — Green Sensation handles density and ripening while Sugar Royal sharpens the aroma. If you're growing in coco, Plagron Coco A & B is the base nutrient designed to slot in cleanly with both.
From our counter
We've been selling Plagron's range since the brand started landing in Dutch grow shops, and Sugar Royal is one of those bottles that keeps coming back into baskets once growers try it. The most common feedback: the smell during the last three weeks of flower hits noticeably harder. The most common mistake: people overdose it thinking more equals better. It doesn't. 1 ml per litre is the ceiling — past that you're just feeding salt to your runoff.
Frequently Asked Questions
Does Sugar Royal contain actual sugar?
No — despite the name, Sugar Royal isn't a sugar-based booster. It contains amino acids, 9% nitrogen, and a resin-stimulating compound. The "sugar" in the name refers to the sugary, sticky resin layer it helps your plants produce.
Can I combine Sugar Royal with other boosters like Green Sensation?
Yes. Sugar Royal is designed to slot into an existing feeding regime alongside other products. Many growers run it with Plagron Green Sensation — Sugar Royal handles aroma and resin while Green Sensation drives density and ripening. They don't overlap.
When do I start using Sugar Royal?
Plagron recommends starting in the second week of the growth phase and continuing every watering until harvest. Starting earlier than week 2 isn't necessary — your seedlings don't need the extra nitrogen at that stage.
Can I use Sugar Royal in hydroponics?
No. Sugar Royal is formulated for peat and coco substrates only. Running it in DWC, NFT, or any recirculating hydro system isn't recommended by Plagron — the formula isn't designed for that environment.
What's the maximum dose I should use?
1 ml per 1 litre of water is the absolute ceiling. Going higher won't give you more terpenes — it'll just push your EC up and risk salt lockout. Stick to the manufacturer's spec.
Will Sugar Royal increase yield?
Sugar Royal is a flavour and aroma enhancer, not a primary yield booster. You may see a modest knock-on effect from healthier plants, but for raw weight and density, pair it with a dedicated bloom booster like Green Sensation.
Last updated: April 2026
