Fertilizers & Nutrients

Plant nutrients and fertilisers are the feed programme that turns a seedling into a heavy harvest — and Azarius stocks over 40 options covering every stage, medium and grow style since 1999. Whether you're ordering your first tablet pack or refining a pro-level schedule, you'll find soil, coco and hydro feeds, PK boosters, root stimulators, enzymes and all-in-one kits from Plagron, Biobizz, Royal Queen Seeds, Bionova, Druid Nutrients and our own Monster Buds line.

Buy Plant Nutrients and Fertilisers — The Azarius Buying Guide

Plant nutrients are concentrated macro- and micro-element blends that plants can actually absorb through their roots. Fertilisers feed the soil; nutrients feed the plant directly. In practice, most growers use both — a living substrate underneath and a liquid or powder feed on top. What you buy depends on three things: your growing medium, your grow stage, and how much effort you want to put in.

Pick Your Feed by Effort Level

If this is your first indoor grow, buy a tablet kit or a granular mix. That's it. The people who ruin their first crop usually did it by overfeeding with a complicated liquid schedule, not by keeping it simple.

What We Carry

• All-in-one base feeds — single-bottle or single-bag solutions covering seed to harvest: Monster Bud Mix, All-in-One Liquid Monster Buds, Berkana, PowderFeeding range.
• Two-part soil and coco feeds — classic grow + bloom splits from Plagron (Terra Grow, Alga Grow, Alga Bloom) and Biobizz (Bio Grow, Bio Bloom).
• PK boosters — the flowering heavy-hitters: Green Sensation, Bud Boost, PK 13-14 Monster Buds, Vegan PK Monster Buds.
• Bloom stimulators — Bloom Boost, Power Buds, Max Yield Monster Buds for denser, stickier flowers.
• Root stimulators and soil life — Power Roots, Hydro Roots, Easy Roots Mycorrhiza Mix, Easy Roots Rhizobacter, Seedbooster Monster Buds, Plagron Seedbooster Plus.
• Enzymes and enhancers — Pure Zym to clean the root zone, Jera Enhancer for nutrient uptake, Sugar Royal and Max Flavour Monster Buds for terpenes.
• Deficiency correctors — Biobizz Calmag for RO water and coco, Vita Race for iron.
• pH control and measurement — pH+ and pH- Monster Buds, Terra Aquatica Liquid pH Test Kit.
• Complete kits — Top Grow Box 100% NATURAL, Top Grow Box 100% TERRA, Easy Pack 100% NATURAL, Easy Pack 100% Terra, Monster Bud Boost Pack, Vegan Boost Pack.

How to Choose Your Plant Nutrients

Start with your medium. Soil forgives a lot — organic feeds like Bio Grow, Bio Bloom and Alga Bloom buffer themselves and work with the microbes already in the substrate. Coco behaves like hydro: it holds nothing, so you feed every watering with a mineral base like Terra Grow or the All-in-One Liquid Monster Buds. Pure hydro setups want clean mineral inputs — PowderFeeding or Hydro Roots — because organic sludge clogs drippers.

Then pick by experience. Beginners: order an Easy Pack or a tablet set and don't add anything else for your first run. Intermediate growers running soil or coco: a two-part base (Bio Grow + Bio Bloom, or Alga Grow + Alga Bloom) plus one bloom booster like Green Sensation covers 90% of what a grow needs. Advanced growers already know they want a PK 13-14, an enzyme, a terpene enhancer and a calmag on the side — shop the Monster Bud Boost Pack or Plagron's full Top Grow Box.

When in doubt, buy less stuff. A clean schedule with three products beats a shelf of twelve bottles you half-understand.

Frequently Asked Questions

What nutrients do cannabis plants actually need?

Nitrogen, phosphorus and potassium (the NPK on the label) plus calcium, magnesium, sulphur and six or so micronutrients (iron, manganese, zinc, boron, copper, molybdenum). Any complete base feed like Bio Grow, Terra Grow or PowderFeeding Hybrids covers all of these — you don't need to buy them separately.

Should I buy organic or mineral nutrients?

Organic (Bio Grow, Alga Bloom, Total Care) feeds soil microbes and produces tastier end-product, but works slower and only in living soil. Mineral (PowderFeeding, Terra Grow, Monster Buds liquid) is faster, cleaner in hydro and coco, and easier to dose precisely. Most growers pick one lane and stick with it.

Do I need a PK booster?

Not for a healthy soil grow with a decent bloom base — Bio Bloom or Alga Bloom already contains plenty of phosphorus and potassium. You'll notice the difference from adding Green Sensation, Bud Boost or PK 13-14 Monster Buds in weeks 4–6 of flower, when the plant's demand spikes. Skip it on your first grow.

What's the easiest fertiliser for a first-time grower to buy?

Get a tablet kit. Easy Combo Booster Pack 5 from Royal Queen Seeds gives you two veg tablets and three bloom tablets — drop them in the soil, water as normal, done. No measuring, no pH pen, no mid-cycle panic. Easy Boost Natural Nutrition does the same job as pellets mixed into the soil.

Can I use the same nutrients in soil, coco and hydro?

Some yes, most no. PowderFeeding Hybrids, PowderFeeding Short Flowering and PowderFeeding Long Flowering are designed to work across all three mediums, which is why they sell well. Liquid organics like Bio Grow are soil-only. Check the label — it'll say "Terra", "Coco", "Hydro" or "all media".

Do I need a pH meter if I buy proper nutrients?

In soil with organic feeds, usually no — the soil buffers itself. In coco or hydro, yes. Grab the Terra Aquatica Liquid pH Test Kit (no batteries, lasts about 1,000 tests) and a bottle of pH- Monster Buds to bring tap water down into the 5.5–6.5 range where roots absorb properly.

Last updated: April 2026