Green Planet Nutrients Medi One - 23 litres

Available Phosphate (P₂O₅) supports root development, energy transfer, and early structural growth by providing a form of phosphorus that plants can absorb and use quickly.

Boric acid supplies boron, which plants need in extremely small amounts to build healthy new growth and support flowering and fruit development, but the safe range is very narrow. It’s unique because deficiency shows up first in the newest tissues while excess often burns older leaf edges, so accurate diagnosis and tiny, careful corrections matter more than with most nutrients.

Boron is essential because it stabilizes cell walls, supports root and shoot growth, and regulates sugar movement throughout the plant. What makes boron unique is its limited mobility and extremely narrow range between deficiency and excess, which causes new growth to show symptoms rapidly when levels fall out of balance.

Calcium is important because it builds and stabilizes plant cells as they form, acting as the structural support that keeps new growth strong and functional. Unlike other nutrients that drive color or speed of growth, calcium’s role is unique because it controls cell wall strength and membrane stability, making it essential for healthy roots, shoots, and long-term plant resilience rather than quick visual results.

Copper is important because it powers key enzymes that support energy use, tissue strength, and stress protection, and it’s unique from many other micronutrients because plants need it in tiny amounts but can be harmed quickly if copper becomes excessive.

Copper sulfate is useful because it releases copper quickly, which can correct a true copper deficiency and support enzyme activity, strong new growth, and healthy tissue formation, but it’s risky because that same fast, reactive copper can burn foliage, stress roots, and accumulate in growing media if conditions like low pH or repeated use make copper too available compared with gentler copper sources.

Ferrous sulfate supplies iron in a fast-acting, reactive form that helps plants make chlorophyll properly, so new leaves can return to a deeper green when the yellowing is truly iron-related. It’s unique because it can work quickly but is highly dependent on root-zone pH and water chemistry, meaning it may only be a lasting fix when iron can stay soluble and available.

Fish protein hydrolysate supplies small amino acids and peptides that can be used quickly as building blocks for new tissue, making it especially helpful for recovery and steady growth when demand is high. It’s unique because the protein is already broken down into fast-available forms, so it can support plants more quickly than heavier, slower fish-based inputs while still requiring careful dosing to avoid soft growth and root-zone oxygen issues.

Soluble potash (K2O) is important because it helps plants control water use, move sugars to new growth and fruit, and build stronger, higher-quality structure under stress. It’s unique from many other nutrients because it acts more like a regulator and transport helper than a direct “building material,” so the biggest benefits show up as steadier growth, stronger stems, and better finishing instead of just bigger leaves.

Sulfur is important because plants need it to build key amino acids and proteins that drive real growth, strong structure, and efficient use of nitrogen, making it uniquely different from “look-alike” nutrients that may change leaf color without supporting the plant’s core building process.

Total iron (Fe) matters because iron supports chlorophyll development and plant energy systems, keeping new growth green and vigorous; it’s unique from many other nutrients because iron deficiency usually shows up first in young leaves even when older leaves stay green, since iron doesn’t easily move within the plant.

Total magnesium is important because magnesium powers chlorophyll and energy use, helping plants stay green, turn light into growth, and use other nutrients efficiently—and it’s unique because its problems often come from nutrient balance and uptake competition, not just a simple shortage.

Total manganese matters because it supports photosynthesis and enzyme activity that keep new growth green and vigorous, and it’s unique because “total” manganese measures what’s present but not necessarily what the plant can absorb—so pH and root conditions decide whether manganese helps or harms.

Total Nitrogen is important because it directly drives leafy growth, chlorophyll production, and overall growth speed, which sets the pace for the entire plant. It’s unique because the “total” number can include different nitrogen forms that behave differently in the root zone, meaning the same total amount can produce very different results depending on the nitrogen type and plant stage.

Total Zinc (Zn) matters because zinc controls key growth processes that affect leaf size, healthy new shoots, and normal development, and low zinc often causes stunting even when everything else seems correct. It’s unique from many other nutrients because plants need it in tiny amounts and it’s often present but “locked up” by pH or nutrient imbalance, so the challenge is availability—not just quantity.

Magnesium sulfate supplies magnesium for chlorophyll and sugar movement plus sulfur for protein building, helping plants stay efficient and green during high-demand growth. It’s unique because it adds magnesium without extra nitrogen or calcium, so it corrects magnesium issues with fewer side effects when balance is the real goal.

Manganese sulfate supplies manganese, a micronutrient that helps plants run key photosynthesis and enzyme processes, so new growth stays properly green and growth doesn’t quietly stall. It’s unique because it delivers manganese in a simple, fast-available form that responds strongly to root-zone conditions, so getting pH and balance right matters as much as adding the nutrient.

Yes, it can if it pushes phosphorus too high or drives pH too low, because both conditions can reduce the plant’s ability to take up key micronutrients and calcium even when they’re present in the feed, which makes phosphoric acid uniquely powerful compared with slower, gentler phosphorus sources.

Potassium sulfate is often preferred because it supplies potassium without added chloride and also provides sulfur, which supports protein-building and efficient nutrient use, making it a cleaner, balanced option when plants are sensitive to chloride or when you want potassium without pushing extra nitrogen or phosphorus.

Sodium nitrate can deliver nitrate nitrogen very fast, which can quickly green up and accelerate leafy growth, but it’s not ideal for all plants because it also adds sodium that can build up and interfere with balanced nutrient uptake over time.

Zinc sulfate supplies plant-available zinc to quickly correct zinc deficiency, helping restore normal new leaf expansion and steady growth at the tips. It’s important because zinc is needed in tiny amounts but strongly affects growth regulation, and zinc sulfate is unique for its predictable solubility and fast correction compared to slower zinc sources.