Green Planet Pro Cal (1L / 5L)

What is Green Planet Pro Cal used for?

Green Planet Pro Cal is a Cal-Mag style supplement that supplies readily available calcium, magnesium, and chelated iron. It’s designed to prevent and correct common deficiency issues, especially in coco coir, hydro systems, and RO or rainwater setups where Ca/Mg shortages show up easily.

Is Green Planet Pro Cal basically a Cal-Mag supplement?

Yes, but with extras. Alongside calcium and magnesium, Green Planet Pro Cal includes chelated iron and small supporting micronutrients, which helps keep new growth green and nutrient uptake running smoothly under high-demand conditions.

What’s the NPK of Green Planet Pro Cal?

Green Planet Pro Cal is commonly listed as 2-0-0. That small amount of nitrogen comes from its calcium source and helps support healthy growth, but it’s not meant to replace your base nutrients.

When should I use Green Planet Pro Cal in a grow cycle?

Most growers use Green Planet Pro Cal throughout veg and flowering, then stop about one week before harvest if they run a flush or finish phase. It’s often used continuously in coco or RO-water setups as prevention.

What is the recommended dosage for Green Planet Pro Cal?

A common baseline dose is 1.25 mL per litre of water. In coco or RO grows, many growers use it regularly. In soil with decent tap water, it’s often used only when deficiency symptoms appear.

What deficiency symptoms does Green Planet Pro Cal help with?

It’s commonly used for rust spots, interveinal yellowing, weak or twisted new growth, creeping leaf edge burn, and pale new leaves linked to calcium, magnesium, or iron shortages.

How quickly does Green Planet Pro Cal work?

If deficiency is the real issue, you’ll usually see healthier new growth within a few days to a week. Existing leaf damage rarely repairs itself, so improvement is judged by new growth and the problem stopping.

Is Green Planet Pro Cal especially good for coco and RO water?

Yes. Coco can bind calcium and magnesium, and RO or rainwater starts with very low mineral content. Green Planet Pro Cal is commonly used in these setups to prevent classic Ca/Mg problems before they snowball.

Can I use Green Planet Pro Cal in hydroponics and soil?

Yes. It works in hydro systems like DWC, NFT, drip, and recirculating reservoirs, as well as soil. In soil, be more conservative since salts can accumulate more easily.

Will Green Planet Pro Cal raise EC or cause nutrient burn?

It will raise EC because it adds minerals. If your feed is already strong, you may need to slightly reduce base nutrients. Overuse can cause tip burn, lockout, or stalled uptake.

Does Green Planet Pro Cal affect pH, and when should I pH?

It can nudge pH depending on your water and nutrient mix. Always mix base nutrients and Green Planet Pro Cal first, then adjust pH on the final solution.

Can I use Green Planet Pro Cal with other nutrients and additives?

Yes. It’s compatible with most nutrient brands, PK boosters, and silica. Avoid stacking multiple Cal-Mag products unless you deliberately reduce doses and closely monitor EC.

Can Green Planet Pro Cal be foliar sprayed?

It’s mainly designed for root-zone feeding. Foliar Ca/Mg can work, but it’s easy to spot or burn leaves if mixed too strong. If you experiment, use a very light dose and test first.

Does Green Planet Pro Cal help with blossom end rot?

It often helps, since blossom end rot is commonly linked to calcium delivery issues. However, consistent watering and proper root-zone conditions are just as important as calcium supply.

How should I store and handle Green Planet Pro Cal?

Store it sealed, cool, and out of direct sunlight. Shake well before use. Handle like any fertiliser: avoid eye contact, wash hands after use, and keep away from kids and pets.