Fertilizers & nutrients
by Royal Queen Seeds
The Easy Combo Booster Pack 3 is a colour-coded tablet system from Royal Queen Seeds that replaces messy liquid fertilisers with pre-measured organic nutrient tablets. Brown tablets for vegetation, pink tablets for bloom — dissolve in water and you're done. No measuring jugs, no spills, no guesswork. Just drop, dissolve, and water your plants.
Liquid nutrients are a faff. Bottles separate if you leave them too long, they oxidise once opened, and measuring out 5ml of this and 3ml of that with sticky syringes gets old fast — especially when you've got soil under your fingernails and you're trying not to drip CalMag across the kitchen counter. We've been there. Most growers have.
Royal Queen Seeds designed the Easy Combo Booster Pack 3 to cut all of that out. Each tablet contains a precise measurement of organo-nutrients and minerals formulated for a specific growth stage. You don't need a PPM meter, you don't need a PhD in plant science, and you definitely don't need six different bottles cluttering up your grow space. The most complicated thing you'll do is make sure your hands are dry before you reach into the pack.
The tablets won't degrade on the shelf the way opened liquid feeds do. No oxidation, no separation, no shaking the bottle for two minutes hoping everything recombines. They stay consistent from the first tablet to the last. For a small home grow — say 2 to 4 plants — this is genuinely the lowest-effort feeding system we carry.
Each Easy Combo Booster Pack 3 contains two types of tablets, colour-coded so you always grab the right one. No squinting at labels, no mixing up bottles.
| Tablet Colour | Growth Phase | Dilution — Young Plants | Dilution — Established Plants |
|---|---|---|---|
| Brown | Vegetation | 1 tablet per 5 litres | 1 tablet per 3 litres |
| Pink | Bloom | 1 tablet per 8 litres | 1 tablet per 5 litres |
The brown vegetation tablets are designed from germination through the vegetative stage. Young seedlings get a gentler ratio at 1 tablet per 5 litres of water. Once your plants are established with strong root systems and multiple nodes, you increase concentration to 1 tablet per 3 litres. Royal Queen Seeds reports that plants respond with noticeable turgor, shiny leaves, and strong root development during this phase.
Switch to the pink bloom tablets the moment your plants begin flowering. Start at 1 tablet per 8 litres for early bloom, then increase to 1 tablet per 5 litres as your plants hit peak flowering and nutrient demand ramps up. The bloom formula is designed to encourage more budding sites and heavier flowers.
| Spec | Value |
|---|---|
| Brand | Royal Queen Seeds |
| Product type | Organic nutrient tablets (veg + bloom) |
| SKU | HS0557 |
| Tablet colours | Brown (vegetation) / Pink (bloom) |
| Veg dilution range | 1 tablet per 3–5 litres |
| Bloom dilution range | 1 tablet per 5–8 litres |
| Nutrient type | Organo-nutrients and minerals |
| Coverage | Full life cycle — germination to harvest |
| Measuring equipment needed | None |
Complete your setup: pair the Easy Combo Booster Pack 3 with a Royal Queen Seeds Easy Start tray for germination, or grab a soil mix from our growshop fertiliser range. If you're running a tent grow, a pH testing kit helps confirm your dissolved solution is in the right range — the tablets handle nutrients, but your water source still matters.
We've sold liquid nutrients, powder nutrients, and these tablets side by side for years. The tablets don't give you the micro-level control that a full liquid line does — if you're an experienced grower who likes dialling in exact NPK ratios week by week, this isn't your product. That's not a flaw; it's a design choice. Royal Queen Seeds built this for growers who want results without the fiddling.
The one thing to watch: water temperature matters when dissolving. Lukewarm water (around 20-22°C) dissolves the tablets faster and more evenly than cold tap water straight from the mains. We've seen growers complain about residue at the bottom of their watering can — nine times out of ten, the water was too cold. Give it a stir after dropping the tablet in, wait 2-3 minutes, stir again. Sorted.
Compared to the CANNA range of liquid fertilisers, the Easy Combo Booster Pack 3 trades precision for convenience. CANNA gives you separate bottles for every micro and macro nutrient, which is brilliant if you enjoy the process. The RQS tablets give you a single tablet per phase, which is brilliant if you don't. Both work. We'd point newer growers toward the tablets every time — there's less to get wrong.
Start with this if you're running a small home grow (1-4 plants) and you don't want to invest in a shelf full of liquid bottles. The Easy Combo Booster Pack 3 covers your entire grow cycle — germination through harvest — with two tablet types. That's it. No base nutrients, no separate boosters, no cal-mag bottles, no PK 13/14 top-ups. For a straightforward soil grow, these tablets handle the job.
If you're scaling up to 10+ plants or running hydro, you'll likely outgrow this system and want the control that a full liquid nutrient line offers. But for the kitchen windowsill grower, the balcony gardener, or the first-timer with a single tent? This is the path of least resistance to healthy plants.
These tablets are formulated for soil and coco grows. In a hydro setup, you need precise control over EC and pH that pre-measured tablets can't provide. Stick to liquid nutrients for hydroponics — the RQS tablets work best dissolved in water for hand-watering soil-grown plants.
That depends on how many plants you're feeding and how often you water with nutrients. For a typical 2-4 plant grow running a full seed-to-harvest cycle, one pack should see you through. Larger grows will burn through tablets faster — plan accordingly.
Stored dry and sealed, the tablets stay stable far longer than opened liquid nutrients. No oxidation, no separation. Keep them away from moisture and direct sunlight, and they'll be good for well over a year.
Use lukewarm water around 20-22°C and give it a proper stir. Cold tap water is the usual culprit when residue sits at the bottom. A second stir after 2-3 minutes sorts it out. If grit persists, your water may be too cold.
You can, but be careful with overfeeding. The tablets are designed as a complete feed for each growth phase. Adding liquid nutrients on top risks nutrient burn — yellow leaf tips and crispy edges. If you do combine, cut the liquid dose by at least half and watch your plants closely for signs of excess.
Royal Queen Seeds describes them as organo-nutrient tablets — a blend of organic nutrients and minerals. They're not certified organic in the EU regulatory sense, but the formulation is designed around organic growing principles.
Switch when you see the first pistils (white hairs) appearing at the nodes. That's your plant telling you it's entered the flowering phase. Don't switch based on a calendar — watch the plant.
Last updated: April 2026
