FloraMicro® (Hardwater)

Advanced Nutrient System General Hydroponics View available resources

If you have hard water, you can easily adapt Flora Series® by using FloraMicro® Hardwater instead of our standard formula. FloraMicro® Hardwater is part of Flora Series®, the original three-part hydroponic-based nutrient system from General Hydroponics®. By using different combinations of FloraMicro® Hardwater, FloraGro®, and FloraBloom®, you can fulfill each plant’s nutrient needs for every growth stage and environment. This combination, which you’ll modify based on each phase of growth, is optimized to deliver the primary, secondary and micronutrients your plants need for vigorous growth, large flowers, enhanced yields and nutrient-dense crops. Just follow our easy to use Feed Charts to get precise feeding without the guesswork.

Available sizes

The Original 3-Part Hydroponic Base Nutrient

Over 40 years ago, when the other guys were still in grade school, our scientists were hard at work with a mission: give growers a simple and precise way to feed their plants throughout every phase of growth. First formulated in 1976, Flora Series is the Original 3-Part hydroponic base nutrient consisting of FloraGro®, FloraBloom®, and Flora Micro®.

For Varying Degrees of Hardwater

If your tap water is over 200 ppm (or contains Calcium above 70 ppm), use FloraMicro Hardwater instead of our original FloraMicro. Or, if your water contains 30 to 50 ppm Calcium, you can mix our original FloraMicro with FloraMicro Hardwater to create a perfect Micro blend for your plants.

Complete Plant Nutrition

By using different combinations of FloraGro®, FloraBloom®, and FloraMicro®, you can easily fulfill each plant’s nutrient needs for every growth stage and environment. This combination, which you’ll modify based on each phase of growth, is optimized to deliver the primary, secondary and micronutrients your plants need for vigorous growth, large flowers, enhanced yields and nutrient-dense crops with precision and without the guesswork.

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

Guaranteed analysis

  • n5
  • p0
  • k1

Derived from: Ammonium Molybdate, Ammonium Nitrate, Calcium Carbonate, Calcium Nitrate, Cobalt Nitrate, Copper EDTA, Iron DTPA, Iron EDDHA, Iron EDTA, Manganese EDTA, Potassium Borate, Potassium Nitrate, Urea, and Zinc EDTA.

  • Total Nitrogen (N) 5.0%
    • 0.3% Ammoniacal Nitrogen
    • 3.7% Nitrate Nitrogen
    • 1.0% Urea Nitrogen
  • Soluble Potash (K2O) 1.0%
  • Calcium (Ca) 1.0%
  • Cobalt (Co) 0.0005%
  • Copper (Cu) 0.01%
    • 0.01% Chelated Copper (Cu)
  • Iron (Fe) 0.1%
    • 0.1% Chelated Iron (Fe)
  • Manganese (Mn) 0.05%
    • 0.05% Chelated Manganese (Mn)
  • Molybdenum (Mo) 0.0008%
  • Zinc (Zn) 0.015%
    • 0.015% Chelated Zinc (Zn)

Flora Series Feed Charts

Whether you’re a commercial grower or a hobbyist, the Flora Series Feed Charts are the easy and precise way to give your plants what they need, when they need it, without the guesswork. Download them today for a better grow tomorrow.

Grow like a pro

Explore the most comprehensive offering of commercial growing solutions tailored to support your entire operation end-to-end and get the greatest possible returns while staying one step ahead of the competition.

Getting started

Learn from the best

FAQs

View all FAQs
  • 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.

  • 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.

  • 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.
  • 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.

    • When using both Armor Si and CALiMAGic, add Armor Si to the reservoir first.
    • When using Armor Si and/or CALiMAGic, with Flora Series, these products should be added prior to adding FloraMicro.
  • Properly stored (cool environment, out of sunlight, sealed container) they should last indefinitely.

  • 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”.

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.

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.

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.

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.

  • When using both Armor Si and CALiMAGic, add Armor Si to the reservoir first.
  • When using Armor Si and/or CALiMAGic, with Flora Series, these products should be added prior to adding FloraMicro.

Properly stored (cool environment, out of sunlight, sealed container) they should last indefinitely.

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”.