BioBizz Light-Mix and Coco Feed Chart – Doses per Litre

BioBizz's own published Light-Mix and Coco-Mix schedule for coco and light, unfertilised soil. Week by week, in millilitres per one litre of water.

BioBizz Light-Mix and Coco-Mix feed chartCoco and light soil · Grow 1 to Flower 8, then a flush · tap to enlarge

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• All dosesper 1 litre
• pH6.2 – 6.5
• Base feedBio-Grow or Fish-Mix, 2–4ml

Every figure is millilitres per one litre of water, not per ten. Most feed charts are written per 10 litres, so check this one twice. A 10-litre watering can takes ten times what you see here — Bio-Grow at 3ml per litre is 30ml in a 10-litre can.

Getting it right

• Bio-Grow or Fish-Mix, never both. The two sit on the chart at the same dose because they are alternatives, not a pair. BioBizz say to replace Bio-Grow with Fish-Mix through the vegetative weeks, then switch to Bio-Grow when you want to trigger flowering. Run them together and you double the nitrogen.
• Root-Juice is Grow 1 only. 4ml per litre in the first week, and it does not appear again anywhere on the chart.
• Light-Mix and Coco-Mix hold no food. Neither is pre-fertilised, so the base feed climbs properly — Bio-Grow or Fish-Mix at 2ml from Grow 2, 3ml at Flower 3 and 4, then 4ml from Flower 5 to the end.
• Alg-A-Mic is on this chart. It is a seaweed tonic for stressed or hungry-looking plants. 1ml at Flower 1, then 2ml, 2ml, 3ml, 3ml, and 4ml for Flower 6, 7 and 8.
• Top-Max steps up late. It runs at 1ml per litre from Flower 1 to Flower 5, then jumps to 4ml for the last three weeks.
• Bio-Heaven and Acti-Vera run all the way. Both start at 2ml per litre in Grow 1 and climb to 5ml by Flower 6. They are tonics, not a feed, so they sit alongside whatever base you are running.
• Keep pH between 6.2 and 6.5. If your system controls pH for you, hold it at 6.2 to 6.3. Coco holds no buffer of its own, so check it every time you mix.
• Coco wants an enzyme. Organic feeds leave more behind in coco than in soil. An enzyme product keeps the root zone clean between waterings.
• Soft water needs CalMag. On reverse osmosis or very soft tap water, BioBizz recommend CalMag at every watering. It is on a separate table on their sheet rather than this chart, so follow the dose on the bottle you own.
• The flush week is plain water. Every row on the chart stops.
• Under-feed rather than over-feed. BioBizz's own advice is that a plant recovers from too little, but rarely from an overdose.

Everything on the chart

Common questions

Is this per litre or per 10 litres?

Per one litre. Bio-Grow at 4ml means 4ml in a 1-litre jug, or 40ml in a 10-litre watering can.

Do I run Bio-Grow and Fish-Mix together?

No. Pick one. BioBizz suggest using Fish-Mix through the vegetative weeks and moving to Bio-Grow when you want to trigger flowering. Both rows show the same dose because they are two ways of doing the same job.

Growing in All-Mix instead?

Different chart, much lower doses, because All-Mix comes pre-fertilised. See the BioBizz All-Mix feed chart.

Why does the chart restart at 1 when flowering starts?

BioBizz number their own sheet WK1 to WK12 straight through. Growers count flowering from the flip, so ours restarts there. Their WK1–2 is our Grow 1–2, their WK3–10 is our Flower 1–8, their WK11 is the flush and WK12 is harvest.

Do I need CalMag?

On reverse osmosis or very soft tap water, yes — BioBizz recommend it at every watering. It sits on a separate table on their sheet, not on this chart, so use the dose printed on the bottle.

Is Alg-A-Mic worth adding?

It is a seaweed tonic rather than a feed. It goes in from Flower 1 at 1ml per litre and helps a plant that looks stressed, pale or over-fed. The All-Mix chart does not use it; this one does.

What goes in during the flush week?

Plain water. Every product on the chart stops.

Shop the full BioBizz range

Figures as published by BioBizz on their own feed chart, biobizz.com. Always read the label on the bottle you own. BioBizz is a trade mark of its owner.