Botanicare Feeding Schedule: The Pure Blend Pro Grow & Bloom Chart Explained
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Botanicare Feeding Schedule: The Pure Blend Pro Grow & Bloom Chart Explained
Botanicare's Pure Blend Pro line is a two-part base, Grow and Bloom, built around natural minerals and organic extracts rather than a pure salt-based mix. The base is simple: one bottle for vegetative growth, one for flowering, dosed in ml per gallon of water. What actually gets complicated is the supplement line stacked on top of it, six real products with their own dosing and their own cost, and that's where most of the confusion (and most of the spend) actually happens. Here's Botanicare's own published feed chart, plus an honest look at what the base-only route costs versus running the full stack. We don't upsell.
The 30-Second Answer
- The base is genuinely simple: Pure Blend Pro Grow during vegetative growth, Pure Blend Pro Bloom from flip through harvest, dosed 7 to 30 ml per gallon depending on the week.
- Botanicare's own chart runs an 8-week bloom cycle, ramping dose up through the middle weeks and tapering it back down for ripening.
- If you're in coco or using reverse osmosis water, Botanicare's own instructions call for a minimum of 5 ml of Cal-Mag Plus per gallon during at least the first two weeks.
- Base-only costs a fraction of the full six-product stack. Both are legitimate ways to run this line; the full stack isn't mandatory to get a real result.
We stock the whole line and would rather tell you honestly what's optional. We don't upsell.
The official Pure Blend Pro feed chart
This is Botanicare's own published dosing for the two-part base, straight from their official Pure Blend Pro feed sheet, in ml per gallon of water.
A few things worth calling out directly from Botanicare's own chart. There's no overlap week where both Grow and Bloom run together, it's a clean handoff: Grow stops the moment Bloom Transition starts. Dose climbs steadily through the first half of flowering (25 to 30 ml) and comes back down for the final two weeks (25, then 20 ml) as the plant ripens. And seedlings get a genuinely light hand, 7 ml/gallon in week one, well under half the vegetative rate.
The supplement line, and what it actually adds
The two-part base is the whole story if you want it to be. Botanicare also sells six supplements that layer onto this same chart, and the honest read is that some earn their place more clearly than others depending on your setup.
| Supplement | What it's for | Typical dose |
|---|---|---|
| Cal-Mag Plus | Calcium/magnesium, required in coco or RO water | 5 to 7 ml/gal |
| Silica Blast | Silicon for stem and cell wall strength | Per label, mix before other supplements |
| Sweet (Carbo Raw) | Carbohydrate/flavor supplement | 10 to 15 ml/gal |
| Hydroguard | Beneficial bacteria for root zone health | 10 to 15 ml/gal |
| Hydroplex | Bloom enhancer for the flowering stretch | Per label, flowering weeks only |
| Clearex | Salt-leaching flush solution | 15 to 30 ml/gal, flush only |
Of these, Cal-Mag Plus is the one that's genuinely close to mandatory rather than optional: Botanicare's own instructions specify a minimum of 5 ml per gallon during at least the first two weeks for anyone growing in coco coir or with reverse osmosis water, since neither of those starting points carries the calcium and magnesium a plant needs on its own. The rest are real, functional additions, but the base two-part alone will carry a plant through a full cycle without them.
What the full line actually costs
Here's the part the feed chart alone doesn't show you. Running only Grow and Bloom for a full cycle is inexpensive relative to the rest of the premium nutrient market. Add all six supplements and the cost roughly triples, not because any one bottle is expensive on its own, but because six separate line items add up the way any six-part system does. Neither approach is wrong. If you're growing in a quality soil with decent inputs already, base-only is a completely legitimate way to run this line. If you're in coco, hydro, or pushing for a specific quality target, the supplements are solving real, specific problems rather than being decorative add-ons.
Why this line doses differently than a salt-based nutrient
If you're used to a straightforward mineral salt nutrient, Pure Blend Pro's dosing rhythm might look unusual at first. The line is built around natural minerals and organic extracts rather than pure mineral salts, and that's part of why the numbers ramp the way they do: 7 ml for a seedling is genuinely gentle, and the climb to 20 ml by the third week of veg is gradual rather than jumping straight to a full-strength dose. Organic-leaning nutrients like this generally forgive a slightly heavy hand better than a pure salt mix does, since less of what's in the bottle is immediately plant-available in the same way, but that's not a reason to ignore the chart. It's a reason the chart looks the way it does.
The same logic shows up in the bloom taper. A lot of growers assume more nutrient equals a better finish right up until harvest, but Botanicare's own numbers pull back from 30 ml down to 25, then 20 ml over the final two weeks. That taper isn't a typo, it mirrors what the plant is actually doing in ripening: nutrient uptake naturally slows as the plant redirects energy into finishing flowers rather than continued vegetative-style feeding, and pushing a heavy dose against that natural slowdown tends to show up as harshness in the final product rather than bigger yields.
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What We'd Tell You at the Counter
Start with just Grow and Bloom if this is your first run with this line. Follow the chart as published, 7 ml through 30 ml on the ramp up, back down to 20 ml by the final week, and you'll get a real result without touching a single supplement. The one exception we'd actually push on: if you're in coco or running reverse osmosis water, add Cal-Mag Plus from day one, since that's not really optional at that point, it's filling a gap the base nutrient doesn't cover. Everything else on the supplement shelf is a genuine upgrade, not a requirement, so add it if you're chasing something specific, not because the chart implies you need six bottles to get a harvest. We sell the whole line and would rather you start simple. We don't upsell.
Frequently asked questions
What is the Botanicare Pure Blend Pro feeding schedule?
Pure Blend Pro Grow runs through vegetative growth at 7 ml/gallon for seedlings up to 20 ml/gallon by week 3 of veg. Pure Blend Pro Bloom takes over completely at the flip, starting at 25 ml/gallon, peaking at 30 ml/gallon during weeks 4 through 6 of flowering, then tapering to 25 and 20 ml/gallon for the final two ripening weeks. There's no overlap between the two; Grow stops the moment Bloom starts.
Do I need Cal-Mag Plus with Botanicare Pure Blend Pro?
If you're growing in coco coir or using reverse osmosis water, yes. Botanicare's own instructions call for a minimum of 5 ml of Cal-Mag Plus per gallon during at least the first two weeks in those conditions, since neither coco nor RO water supplies the calcium and magnesium a plant needs on its own. In soil with decent mineral content, Cal-Mag Plus is more optional.
Do I need all six Botanicare supplements to get good results?
No. The two-part Grow and Bloom base will carry a plant through a full cycle on its own. The six supplements (Cal-Mag Plus, Silica Blast, Sweet, Hydroguard, Hydroplex, Clearex) each solve a specific, real problem, root zone health, silicon uptake, flavor, salt buildup, but none are required for a base result. Cal-Mag Plus is the closest thing to mandatory, and only in coco or RO water setups.
What order do I mix Botanicare nutrients and supplements?
Botanicare's own feed sheet specifies mixing supplements like Silica Blast and Cal-Mag in a particular sequence relative to the base nutrient, since adding them in the wrong order can cause them to interact poorly in solution. Always check the current product label for the exact mixing sequence before your first feed, since formulations and instructions can be updated.
When do I flush with Clearex?
Botanicare's chart calls for Clearex use each reservoir change or every two weeks throughout the grow, plus a dedicated flush at the very end of the cycle before harvest, dosed higher (15 to 30 ml/gallon) specifically to leach built-up salts from the growing medium.
Whether you're running the two-part base on its own or building out the full Pure Blend Pro line, everything in this chart, plus the pH and EC tools to dial it in, lives in the Modern Farms catalog. Because, as always, we don't upsell.
For informational and educational purposes only. Dosing shown reflects Botanicare's officially published feed sheet at time of writing; always confirm current rates against the product label, since manufacturers periodically update formulations and instructions. Product names, pricing, and specifications reflect our current catalog and are subject to change.