Grow Island presents: DutchPro Grow A+B Soil for hard water

Two-component growth nutrient for soil with hard tap water

With DutchPro Grow A+B Soil for hard water, Grow Island expands its range with a powerful, professional two-part base nutrient developed specifically for the growth phase in soil substrates and for use with hard or standard tap water. This new product is aimed at growers who work under real-world water conditions and still want to achieve maximum control, stable development, and healthy plants.

Hard water presents particular challenges in soil cultivation. High calcium and magnesium levels can disrupt nutrient ratios and block the uptake of essential elements. This is exactly where DutchPro Grow A+B Soil HW comes in, delivering a precisely balanced nutrient solution that actively accounts for these conditions.

Optimal nutrition during the growth phase

The vegetative phase is the foundation of every successful grow. This is the time when root strength, stem stability, and the plant’s ability to perform in the later flowering phase are determined.

DutchPro Grow A+B Soil for hard water supplies plants in this sensitive phase with a balanced combination of macro- and micronutrients, tailored specifically to the needs of plants growing in soil. The result is even growth, vigorous leaf development, and significantly improved plant health.

Specifically formulated for hard tap water

Not every grower has access to reverse osmosis or rainwater. DutchPro takes this into account by offering the HW version, designed specifically for high starting EC values.

The benefits of this adaptation:

• More stable nutrient availability despite high water hardness
• Reduced risk of nutrient lockout
• Optimized uptake of nitrogen, phosphorus, and potassium
• Protection of the root zone in soil substrates

In soil grows, balanced nutrition is especially important, as excess salts can impair soil structure and root health over time.

Two-part system for maximum efficiency

DutchPro deliberately uses an A+B system to maintain the quality and chemical stability of its nutrients. Certain elements cannot be stored together in concentrated form without losing effectiveness.

Grow A provides, among other things, nitrogen for leaf and shoot growth as well as essential trace elements such as iron, zinc, and manganese.

Grow B complements the solution with calcium, magnesium, and sulfur, which are essential for cell stability, enzyme activity, and healthy metabolic performance.

Only when combined in the irrigation water does a complete, plant-available nutrient solution emerge, precisely matched to the growth phase.

Clean performance without unnecessary additives

Another advantage of DutchPro Grow A+B Soil for hard water is its clean, straightforward formulation. The nutrient contains no unnecessary fillers or problematic additives that could burden the substrate.

With proper use:

• salt buildup in the soil remains minimal
• nutrient uptake stays consistent
• the soil structure remains stable over the long term
• roots benefit from a healthy environment

This makes the nutrient suitable for both small indoor grows and larger projects.

Benefits of DutchPro Grow A+B Soil for hard water at a glance

• New product in the Grow Island range
• Specifically developed for hard tap water
• Optimized for soil substrates
• Supports vigorous vegetative growth
• Promotes strong root and stem development
• Highly concentrated two-part formula
• Simple, precise dosing
• Improves nutrient uptake
• Enhances plant health and vitality
• Free from unnecessary additives

Application and dosage

Basic rules:

• Shake bottles well before use
• Never mix components undiluted
• Always add Grow A first, then Grow B to the water

Recommended dosage during the growth phase:

• Start phase: 2–3 ml Grow A + 2–3 ml Grow B per liter of water
• Vigorous growth: adjust according to plant condition
• Use with every watering during the growth phase

Dosage should always be fine-tuned based on strain, substrate, pot size, and water parameters.

Which applications is this product suitable for?

• Soil cultivation in indoor grows
• Potted plants and substrate cultures
• Growers using hard or standard tap water
• Controlled growth phases before flowering

For soft water or reverse osmosis water, DutchPro recommends the specially adapted SW version.

Conclusion

DutchPro Grow A+B Soil for hard water is a well-thought-out solution for growers working with soil substrates who want to achieve healthy, even plant growth despite high water hardness. As a new addition to the Grow Island range, this nutrient combines professional-grade nutrient technology with practical, real-world application.

A reliable growth nutrient that creates a solid foundation for strong plants and successful flowering phases.