Flora Series® Trial Pack
View available resourcesIt’s easier than ever to try the fan-favorite Flora Series® system with our cost-effective Trial Pack. Backed by forty-five years of scientific research and supported by online feedcharts and our responsive tech services team, Flora Series® helps bolster foliar growth and flower development with consistent, balanced nutrition. Get to the root of your grow with GH!
The original three-part nutrient system

FloraGro®
FloraGro® provides nutrients for structural and foliar growth. Combine with FloraMicro to provide a specialized nutrient for rapidly growing plants during the structural and foliar growth phase.

FloraMicro®
FloraMicro® provides rapidly growing plants with Nitrogen, Potassium and Calcium as well as a combination of chelated micronutrients and trace elements.

FloraBloom®
FloraBloom® provides minerals for the reproductive growth stage to support Flowering, Fruiting and Seed Production.
For use with
Plants
- Hemp
- Vegetables
- Herbs
- Fruits
- Flowers
- Other high value crops
Media
- Rockwool
- Potting mix
- Coco
- Peat lite mix
- In-ground soil
- Water culture
Environments
- Indoors
- Outdoors
Experience
- Beginner
- Intermediate
- Expert

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Getting started
Learn from the best
FAQs
- Why are there three parts to the General Hydroponics Flora Series nutrients?
- Can you explain the purpose of each component of the Flora Series?
- What is a general purpose nutrient recommendation?
- How do I mix the Flora Series?
- Which comes first when mixing Flora Series, Armor Si or CALiMAGic?
- What is the shelf life of the Flora Series nutrients?
- Is the Flora Series organic?
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The concept behind Flora Series is simple: Different kinds of plants have significantly different nutrient needs, and these needs change during each plant’s growth cycle. By using different combinations of FloraGro, FloraBloom and FloraMicro, the grower is able to fulfill the exact needs of the plant at each stage in the plant’s life cycle. As the crop grows, the grower is able to precisely adapt the nutrient formulation to meet the crops changing needs.
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In hydroponics, the plant roots are constantly provided with all the water, oxygen and nutrients they need. The challenge for the grower is to keep up with the plants needs, and to avoid damaging it with either excesses or deficiencies of minerals. As a general rule, a plant consumes more nitrogen during the formative or vegetative stage, and more phosphorus, potassium and magnesium as it flowers.
Throughout its growth cycle, the plant will also consume calcium, sulfur and micro nutrients such as iron, manganese, boron, molybdenum and copper.
FloraMicro, the foundation or “building block” of the Flora Series system, provides nitrogen and calcium as well as trace minerals, which are essential for a comprehensive hydroponic plant diet. By adding FloraGro to FloraMicro, the plant will receive additional nitrogen and potassium, which stimulates structural and foliar growth. To stimulate flower and fruit development, FloraBloom is added to provide the necessary phosphorus, potassium, magnesium and sulfur.
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The proper ratio of each Flora Series nutrient depends on the crop and the stage of growth (look on the label for specific recommendations for different crops). However, as a rule of thumb we use the “1-2-3” ratio:
- For seeds, cuttings, or delicate seedlings use 1/4 tsp. of each nutrient to 1 gallon water
- For the vegetative stage of growth use 3 tsp. FloraGro to 2 tsp. FloraMicro to 1 tsp. FloraBloom to 1 gallon water
- For late vegetative to pre-bloom stage use 2 tsp. of each nutrient to 1 gallon water
- For bloom initiation to ripening stage use 1 tsp. FloraGro to 2 tsp. FloraMicro to 3 tsp. FloraBloom to 1 gallon water.
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Always start with a reservoir filled with water, then add the concentrated nutrients one by one.
Never mix the nutrients together in their concentrated form, as this will cause nutrient “lock-out” making some minerals unavailable. It is best to begin by adding FloraMicro, stirring well, and then adding FloraGro and/or FloraBloom. If both FloraGro and FloraBloom are used, add one, stir well, then add the other.
Be sure to watch Jesse walk you through the process of mixing Flora Series here.
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Properly stored (cool environment, out of sunlight, sealed container) they should last indefinitely.
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Only crops grown from unrefined minerals are recognized as “organic”. The trouble is unrefined minerals do not dissolve well for hydroponic use and some of these unrefined minerals contain quantities of impurities, some of which are toxic to plants. For that reason, FloraBloom, FloraGro, and FloraMicro are made from high quality refined minerals. This ensures high quality crop production, but prevents the crop from being considered “organic”.