RAW Soluble Nutrients Explained: What Each Powder Does

The all-in-one feed for vegetative growth: one powder in place of a feed built from single elements.

• NPK 7-4-5
• 4–6 g per 4 L
• Soil, coco and hydro
• Seedling to pre-flower

• A blend of all twelve RAW solubles, with humic acid, kelp and yucca extract to help uptake
• Aim for about 600–800 ppm at around pH 6.0, starting low and building up

Know before you buyIt is a growth feed. When flowering starts, move on to RAW Bloom, or add RAW Phosphorus and RAW Potassium.

The flowering partner to RAW Grow, used right through the flowering stage as the core mineral feed.

• 1–2 tsp per 3.8 L
• Whole flowering stage
• Hydro, coco and soil
• No fillers or dyes

• Mono potassium phosphate, potassium sulphate, iron DTPA, magnesium and manganese sulphate, with volcanic ash for trace minerals
• A dry concentrate with no added water, so it is lighter than bottled feed and mixed fresh

Know before you buyRAW recommend running it with RAW Calcium Magnesium, so budget for both, especially on soft water or in coco.

A measured cal-mag top-up for RO, soft water and coco, dosed separately from the base feed.

• 15% calcium
• 3% magnesium
• 9% nitrate nitrogen
• 1/16–1/8 tsp per 3.8 L

• Calcium shortage shows in new growth, as tip burn in lettuce or blossom end rot in tomatoes; magnesium shortage yellows older leaves between the veins
• Dose it on its own, so you fix one problem without changing the whole feed

Know before you buyDissolve it in the reservoir water, never in a concentrate. Strong calcium nitrate and sulphates react to form insoluble gypsum.

Makes your feed go further by holding minerals in the root zone until the roots take them up.

• 59% humic acid
• From leonardite
• 1/8–1/4 tsp per 3.8 L
• Soil, coco and hydro

• Buffers root-zone pH and raises cation exchange capacity
• Pairs with RAW Full Up, a fulvic acid that keeps minerals moving into the plant
• RAW run it with RAW Kelp at five parts to two; kelp adds natural auxins and cytokinins

Know before you buyIt is not a feed: the 0-0-4 on the label is a little potash, so keep your base feed as it is.

Beneficial bacteria and fungi for young, rooting plants, from transplant through vegetative growth.

• Mycorrhizal fungi
• Bacillus species
• 2–4 g per 4 L
• Every 1–2 weeks

• Move on to RAW Bloom Microbes once flowering starts
• RAW Cane Molasses feeds them, without the pump-clogging syrup of liquid molasses
• RAW Enzymes breaks down dead roots before they foul the root zone

Know before you buySet EC and pH first, then stir the microbes in last and use the solution promptly. It clouds the water rather than dissolving clear.

pH-neutral silica for sturdier stems and leaves at every stage, without clouding the tank.

• 45% silicon dioxide
• From diatomite
• 1/8–1/4 tsp per 3.8 L
• Every stage

• Unlike the potassium silicate in most liquid silica, it will not push the pH up
• Thicker cell walls help plants cope with heat and drought, and resist powdery mildew and sap-sucking pests

Know before you buyPart of it stays suspended rather than dissolving. Add it to diluted feed, never concentrate, and keep the tank moving with an air stone or pump.

Vitamin B1 and magnesium for transplants and hard spells of heat, drought or salt stress.

• 1% vitamin B1
• 9% magnesium
• 0.3–1.25 g per 4 L
• Soil, hydro and foliar

• Soak the roots in lukewarm water with B-Vitamin at the transplant rate when moving plants from soil to hydro
• Safe at every stage, at its highest rate through heavy flowering and fruiting

Know before you buyIt carries 9% magnesium, so allow for it if you also dose cal-mag.