The GreenPlanet Horti Bloom 5-15-26 is the early-to-mid-flower base of GreenPlanet's HORTI commercial line. A dry, fully soluble fertiliser with magnesium, sulfur and micronutrients, it's built for injectors, stock tanks and dosing systems and runs alongside Horti Cal through the heavy weeks of bloom.
The HORTI flowering base
Horti Bloom's high-phosphorus, high-potassium profile supports flower formation and development from the switch through mid-flower. Magnesium, sulfur and micronutrients are built in. It contains no fillers and leaves no sediment, so it's safe for injectors and dosing lines.
Where it fits in the HORTI program
In the HORTI program, Horti Bloom takes over from Horti Grow at the start of flower and runs with Horti Cal. In the final one to two weeks it hands over to Horti Late Bloom. Follow the HORTI AU feed chart (PDF) for weekly rates.
Full specifications
| Manufacturer | GreenPlanet Nutrients (British Columbia, Canada) |
| Line | HORTI commercial line |
| Type | Dry, 100% water-soluble fertiliser |
| N-P-K | 5-15-26, plus Mg, S and micronutrients |
| Stage | Early to mid flower |
| Mix rate | 1.5–2.5 g per litre |
| Feed chart | HORTI AU feed chart (PDF) |
| Size | 2.3 kg bag |
| Compatibility | Injectors, stock tanks and dosing systems; hydro, coco and soil |
FAQ
Can I use it on its own?
It's designed to run with Horti Cal, which supplies the calcium. Follow the HORTI chart for the pairing.
Can I mix it in the same stock tank as Horti Cal?
No. GreenPlanet advises against combining HORTI products in the same concentrated stock tank, as they can precipitate. Use separate tanks or add each directly to the reservoir.
Can I use it with Dual Fuel?
No. HORTI and Dual Fuel are separate base programs. Pick one.