Nutrient Kit for Fruiting Plants – Fruiting Stage – 1 to 1000 L

The right nutrition to maximise your fruit. This complete hydroponic nutrient kit for fruiting plants – fruiting stage comes into play after petal fall and fruit set – with a specially balanced formula to maximise fruit development, size, flavour and quality.

With enough to prepare between 1 and 1000 litres of nutrient solution, it completes the nutrition cycle for strawberries, tomatoes, raspberries and other fruiting plants in NFT, DWC or other soilless hydroponic systems.

What’s in the kit

• 1 dose of Magnesium Sulphate — 16% MgO / 32% SO₃
• 1 dose of calcium nitrate – 15.5% N / 19% Ca
• 1 dose of potassium nitrate – 13.5% N / 45.5% K₂O
• 1 dose of MKP (Monopotassium Phosphate) — 52% P / 34% K
• 1 dose of micronutrients – manganese sulphate, boric acid, copper, ammonium molybdate, zinc sulphate, iron 6%
• Dilution instructions included

💡 Why is MAP dropped at this stage? The MAP (monoammonium phosphate) in the vegetative kit has a high nitrogen (N) content, which stimulates leaf growth. In the fruiting stage, reducing available nitrogen focuses the plant’s energy on fruit development – hence the formula with only 4 macronutrients.

Which crops is it ideal for?

Main use – fruiting stage:

• Strawberries (after petal fall)
• Tomatoes (after petal fall)
• Raspberries (after petal fall)
• Blueberries (fruiting stage)
• Peppers (after petal fall)
• Cucumbers (after fruit appears)

⚠️ When to switch? Use this kit from the moment the flower drops and the fruit begins to form. Before that, use the vegetative-stage fruit nutrient kit.

How to prepare the nutrient solution – step by step

⚠️ Important: never mix the nutrients directly with each other – each must be dissolved separately before going into the tank.

• 1. Prepare the stock solutions: dissolve each nutrient separately in 5 litres of distilled water (one 5 L bottle per nutrient) — you will end up with 5 bottles of concentrated solution.
• 2. Add to the tank: for every 20 litres of water in the tank, add 100 ml from each bottle.

How do you control these parameters?

Nutrient solution

The plant consumes the solution, and every day the volume in the tank drops. This volume should be topped up every day with water, not with nutrient solution. Plants absorb much more water than nutrients, and since the nutrient solution is saline, topping up with solution every day salinises it until the dissolved salts exceed what the roots can tolerate. If this happens, plants stop growing – not from a lack of nutrients, but because of an excessively high osmotic potential at the roots.

Control the pH of the nutrient solution

As they take up nutrients, plant roots change the pH of the nutrient solution. The pH indicates how acidic or alkaline the nutrient solution is. Plants develop best between pH 5.5 and 6.5, and as they grow they change the pH of the solution. That is why the pH should be measured every day after topping up the solution with water. If it is outside the 5.5–6.5 range, adjust it with acid if above 6.5, or with base if below 5.5.

Control the electrical conductivity of the nutrient solution

As plants grow, the nutrients in the solution are used up and the solution becomes depleted. Eventually the solution can no longer supply the nutrients the plants need. At that point the solution should be replaced. One of the biggest problems is knowing when to change it.

A solution containing salts (nutrients) can conduct electric current. The higher the concentration of dissolved salts, the greater this conductivity. So a drop in electrical conductivity tells you when the nutrient solution needs changing. The easiest way to know the nutrient concentration is to use a conductivity meter.

One of the main reasons growers choose water-culture systems is that growth and maturity are usually 15–25% faster. Growers can still reach the desired plant size with a short vegetative period. So to get optimal early production from these systems, using the right nutrient mix and having the right conditions matter far more.