Description
GreenPlanet HORTI Late Cal Zero-Nitrogen Calcium & Micronutrient Powder
Commercial Late-Bloom Calcium Without Added Nitrogen
GreenPlanet HORTI Late Cal is a specialised, fully water-soluble dry fertiliser formulated to provide highly bioavailable calcium and essential micronutrients during late flowering and fruiting without adding nitrogen.
Designed as part of the GreenPlanet HORTI Commercial Line, HORTI Late Cal provides targeted mineral support when plants are carrying substantial flower or fruit mass but the feeding programme calls for reduced nitrogen.
Unlike conventional calcium supplements that commonly introduce additional nitrogen, HORTI Late Cal allows growers to maintain calcium availability through the finishing phase. This supports plant structure, cell development, late-stage bulking, and overall crop health while maintaining greater control over the nutrient profile.
Key Features
- Zero-nitrogen calcium formula
- Specifically designed for late bloom and fruiting
- Provides highly bioavailable calcium
- Contains essential micronutrients
- Supports strong late-stage bulking
- Helps maintain plant health during finishing
- Supports strong cellular and structural development
- Fully water-soluble dry fertiliser
- Designed for commercial hydroponic cultivation
- Suitable for day tanks and reservoirs
- Compatible with injector and automated dosing systems
- Suitable for continuous liquid-feed programmes
- Designed to complement HORTI Late Bloom
- Suitable for both soil and hydroponic substrates
Why Zero-Nitrogen Calcium?
Calcium remains important during late reproductive development because plants continue building and maintaining structural tissue while flowers and fruit increase in mass.
However, many conventional calcium products also contain significant amounts of nitrogen. During late flowering, growers may want to reduce nitrogen while continuing to provide calcium.
HORTI Late Cal separates these requirements.
Its zero-nitrogen formulation allows calcium and essential micronutrient supplementation to continue without unnecessarily increasing nitrogen levels in the late-stage nutrient solution.
Benefits
Supports Late-Stage Bulking
Provides calcium and micronutrient support during the demanding final stages of flower and fruit development.
Maintains Structural Strength
Calcium plays an important role in plant cell walls and structural integrity, helping plants maintain healthy tissue while supporting increasingly heavy reproductive growth.
No Added Nitrogen
Allows growers to maintain calcium availability while following a reduced-nitrogen late-bloom feeding strategy.
Provides Essential Micronutrients
Supplies trace nutrition to help maintain important plant functions throughout the finishing phase.
Commercial-Grade Solubility
The HORTI Commercial Line is designed as a fully soluble fertiliser system for professional fertigation, including reservoirs, day tanks, injectors, and dosing equipment.
Stage-Specific Nutrition
Rather than continuing to use nitrogen-containing HORTI Cal through the entire finishing phase, HORTI Late Cal provides a specialised calcium source developed specifically for late bloom.
HORTI Late Cal + HORTI Late Bloom
HORTI Late Cal is designed to work alongside GreenPlanet HORTI Late Bloom as part of the HORTI Commercial feeding programme.
HORTI Late Bloom provides a 0-24-26 + Mg + S nutrient profile focused on late reproductive nutrition, while HORTI Late Cal supplies calcium and essential micronutrients without nitrogen.
Together, these products allow growers to provide targeted late-stage nutrition while avoiding the need to continue using a nitrogen-containing calcium formula.
Specifications
| Specification | Details |
|---|---|
| Brand | GreenPlanet Nutrients |
| Range | HORTI Commercial Line |
| Product | HORTI Late Cal |
| Product Type | Dry Base Fertiliser |
| Primary Nutrient | Calcium |
| Additional Nutrition | Essential Micronutrients |
| Nitrogen | Zero-Nitrogen Formula |
| Form | Fully Water-Soluble Powder |
| Growth Stage | Late Flowering & Fruiting |
| Primary Function | Late-Stage Calcium & Micronutrient Support |
| Suitable Substrates | Soil & Hydroponic Substrates |
| Fertigation | Suitable |
| Day Tanks / Reservoirs | Suitable |
| Injector / Dosing Systems | Suitable |
| Recommended Companion | HORTI Late Bloom |
Commercial Application
HORTI Late Cal is formulated for professional hydroponic and continuous liquid-feed programmes.
For the general HORTI Commercial Line late-bloom programme, the manufacturer specifies:
| Product | Rate per 100L Water |
|---|---|
| HORTI Late Bloom | 71g |
| HORTI Late Cal | 67g |
This programme targets approximately 1.6 EC, with recommended solution pH within approximately 5.5–6.3.
Application requirements can vary significantly between crops, source-water conditions, environmental conditions, and commercial feeding strategies. Crop-specific HORTI feeding schedules should therefore be followed where available.
Stock Tank Preparation
HORTI Late Cal can also be prepared as a concentrated stock solution for commercial injection and dosing systems.
When preparing concentrated HORTI stock solutions, dissolve each HORTI fertiliser in a separate stock tank to help prevent precipitation.
Add the powder gradually to water while mixing thoroughly and continue agitation until the granules have completely dissolved.
For commercial stock solutions, the manufacturer's HORTI instructions specify a maximum concentration of approximately 240g/L.
Available Sizes
HORTI Late Cal is available in commercial dry-powder formats including:
1.13kg (2.5lb) and 11.34kg (25lb).
The concentrated format helps reduce storage and handling requirements compared with transporting equivalent volumes of pre-diluted liquid fertiliser.
Why Choose GreenPlanet HORTI Late Cal?
Late-stage crops still require calcium even when growers begin reducing nitrogen.
HORTI Late Cal addresses this challenge with a purpose-built zero-nitrogen calcium and micronutrient formulation. It allows commercial growers to maintain calcium availability during late flowering and fruiting while exercising greater control over nitrogen input.
Combined with its fully soluble powder format and compatibility with commercial fertigation equipment, HORTI Late Cal provides a practical solution for precision late-stage crop nutrition.
FAQs
What is GreenPlanet HORTI Late Cal?
HORTI Late Cal is a fully soluble, zero-nitrogen calcium and micronutrient dry fertiliser formulated specifically for late flowering and fruiting.
Does HORTI Late Cal contain nitrogen?
No. It is specifically formulated without nitrogen, allowing growers to continue supplying calcium during late bloom without introducing additional nitrogen.
What nutrients does HORTI Late Cal provide?
HORTI Late Cal primarily provides highly bioavailable calcium along with essential micronutrients.
When should HORTI Late Cal be used?
It is designed for the late-bloom and fruiting phase, when calcium remains important but the feeding programme calls for reduced nitrogen.
What is the difference between HORTI Cal and HORTI Late Cal?
HORTI Cal has a 14-0-0 + Ca + Mg analysis and provides nitrogen, calcium, and magnesium throughout vegetative and flowering development.
HORTI Late Cal is specifically designed for late bloom and supplies calcium and micronutrients without nitrogen.
What should I use with HORTI Late Cal?
Within the GreenPlanet HORTI Commercial Line, HORTI Late Cal is designed to complement HORTI Late Bloom 0-24-26 + Mg + S.
Is HORTI Late Cal suitable for hydroponics?
Yes. It is suitable for hydroponic substrates and commercial continuous liquid-feed programmes.
Can HORTI Late Cal be used with commercial dosing systems?
Yes. Its fully soluble dry formulation is designed for use with day tanks, reservoirs, injector systems, and commercial nutrient dosing equipment.
Should HORTI Late Cal be mixed directly with other concentrated HORTI powders?
When preparing concentrated stock solutions, each HORTI fertiliser should be dissolved in a separate stock tank to reduce the risk of precipitation.