Quick answer: The Hydrotops feed chart (the Bioponic schedule for hydro and coco) shows what to add to each litre of water from young plants through to the flush. Bioponic Grow runs at 2ml rising to 3 to 4ml while plants grow, Bioponic Bloom builds from 1ml in bloom week 1 to 3.5 to 4ml in weeks 4 to 6, and the boosters (Floral Boost, Triple F and Top Heavy Crop) come in from the middle of bloom. Weeks 9 and 10 are a flush. If in doubt, Hydrotops say use the lower figure.
We stock the Bioponic base feeds and the main additives in our West Bromwich shop and online. Below is the full schedule laid out week by week, then how to read it and how to mix.
The Hydrotops feed chart at a glance
These figures are from Hydrotops' own Bioponic for Hydro and Coco feeding schedule (October 2026 edition, published on hydrotops.net). All figures are ml per litre of water. A tick means the product is used that week at its label rate. EC and pH are a guide only. Swipe the table on a phone to see every week.
| Per litre of water | Young plants | Grow week 1 | Grow onwards | Bloom week 1 | Bloom week 2 | Bloom week 3 | Bloom week 4 | Bloom week 5 | Bloom week 6 | Bloom week 7 | Bloom week 8 | Flush week 9 | Flush week 10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Root Stimulator | 5 to 10ml | 5 to 10ml | 5 to 10ml | 5 to 10ml | 5 to 10ml | 5 to 10ml | 5ml | 3ml | 2ml | ||||
| Bactivator | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| Head Start | 7 to 10ml | 7ml | |||||||||||
| Bioponic Grow | 2ml | 3 to 4ml | 3ml | 2ml | 1ml | ||||||||
| Leaf Feed | half strength | three quarter strength | full strength | full strength | |||||||||
| Top Heavy Crop | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |||||
| Bioponic Bloom | 1ml | 2ml | 3ml | 3.5 to 4ml | 3.5 to 4ml | 3.5 to 4ml | 3 to 4ml | 2 to 3ml | |||||
| Flower Feed | full strength | full strength | full strength | ||||||||||
| Triple F | ✓ | ✓ | ✓ | ✓ | ✓ | ||||||||
| Floral Boost | 0.5 to 1ml | 1ml | 1 to 2ml | 1 to 2ml | |||||||||
| Bioponic Flush | 5 to 10ml | 5 to 10ml | |||||||||||
| EC soft water | 0.6 to 1.2 | 1.2 to 1.4 | 1.4 to 1.7 | 1.5 to 1.8 | 1.6 to 1.9 | 1.7 to 2.0 | 1.8 to 2.1 | 1.9 to 2.2 | 1.7 to 2.0 | 1.4 to 1.8 | 1.2 to 1.5 | 0.4 to 0.8 | 0.4 to 0.8 |
| EC hard water | 0.8 to 1.4 | 1.4 to 1.6 | 1.6 to 1.9 | 1.7 to 2.0 | 1.8 to 2.1 | 1.9 to 2.2 | 2.0 to 2.3 | 2.1 to 2.4 | 1.9 to 2.2 | 1.6 to 2.0 | 1.6 to 2.0 | 1.6 to 1.9 | 0.8 to 1.4 |
| pH | 5.5 to 6.0 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.3 | 6.0 to 6.5 | 6.0 to 6.5 | 6.0 to 6.5 | 6.5 to 7.9 |
We stock the products linked in the table. Head Start, Leaf Feed, Flower Feed and Bioponic Flush are part of the wider Hydrotops range; ask us if you want them.
How to read the chart
Young plants and grow weeks
Young plants get Root Stimulator and Bactivator, with Head Start and a half strength Leaf Feed, at a low EC. From grow week 1, Bioponic Grow comes in at 2ml, then 3 to 4ml once plants are growing well. Stay on the "grow onwards" column for as long as your plants are in growth.
Bloom weeks 1 to 8
Count bloom week 1 from when flowering starts. Bioponic Grow tapers off over the first three bloom weeks while Bioponic Bloom builds up to 3.5 to 4ml. The boosters do their work in the middle of bloom: Floral Boost from week 3 to week 6, Triple F from week 3 to week 7, and Top Heavy Crop from week 4.
Flush weeks 9 and 10
The last two weeks are a flush with Bioponic Flush at a low EC, with Top Heavy Crop still on the chart.
Hard water or soft water?
Bioponic Grow and Bloom come in hard water and soft water versions, and the chart gives an EC range for each. If you are in the West Midlands, your tap water is likely to be hard, so the hard water versions are usually the right choice. If you run RO or soft water, choose the soft water versions and work to the soft water EC row. Not sure? Ask us.
How to mix your Hydrotops feed
- Fill your tank or can with the water you need.
- Add Bioponic Part A, stir, then the same amount of Part B and stir again. Never mix A and B together undiluted.
- Add the additives for that week, one at a time, stirring between each.
- Check EC and adjust to the range on the chart for your water type.
- Check pH last and adjust to the chart range. A pH and EC meter makes this quick.
For a refresher on what the EC and pH rows mean, read our guide How to Read a Nutrient Feed Chart.
FAQs
Is the Hydrotops chart for hydro or coco?
Both. The schedule above is Hydrotops' Bioponic for Hydro and Coco feeding schedule, so it suits recirculating hydro, drip systems and coco.
When do I start Bioponic Bloom?
From bloom week 1 at 1ml per litre, rising to 2ml in week 2 and 3ml in week 3, then 3.5 to 4ml for weeks 4 to 6.
When do I add Triple F and Floral Boost?
Both come in from bloom week 3. Floral Boost runs at 0.5 to 1ml in week 3, 1ml in week 4 and 1 to 2ml in weeks 5 and 6. Triple F is used from week 3 to week 7 at its label rate.
What EC should I run with Hydrotops?
It depends on your water and the week. In soft water the chart runs from 0.6 to 1.2 for young plants up to 1.9 to 2.2 in bloom week 5. In hard water it runs from 0.8 to 1.4 up to 2.1 to 2.4. Hydrotops say the EC and pH figures are a guide only.
Do I need every product on the chart?
No. Bioponic Grow and Bloom are the base feeds. Root Stimulator, Bactivator and the bloom boosters are there to push results further. Skip any row you are not using.
Need a hand?
Bring your setup details into our shop at Unit 2 Black Lake, West Bromwich, B70 0PJ, call 0121 553 7872 or WhatsApp us. Browse the full Hydrotops range online, with free UK delivery over £94.99 and price match on what we stock.