What is GreenPlanet Horti rawK 0-0-62 used for?
GreenPlanet Horti rawK is a highly concentrated late-flower potassium additive designed to support flower mass, bulk, structural strength and final-stage development. Its 0-0-62 analysis means it contains no nitrogen or phosphorus and supplies 62% soluble potash as K₂O. It is not a complete fertiliser or conventional PK booster; it is a short, targeted potassium treatment intended for the final flowering window.
How does GreenPlanet Horti rawK help flower development?
Horti rawK supplies concentrated potassium during the stage when flowering plants may have high demand for it. Potassium supports sugar production, energy storage, water regulation, enzyme activity and cellular strength, all of which contribute to healthy late-stage flower development. GreenPlanet positions the product to support heavier, denser flower sites, but final density and yield still depend on genetics, lighting, root health, temperature and the overall nutrient program.
When should I use GreenPlanet Horti rawK?
Use Horti rawK during the final three weeks of flowering, applying it once per week and leaving at least one final week without it before harvest. It is not intended for vegetative growth, seedlings or early flowering. Because the formula is extremely concentrated, the product makes the most sense once flower mass is already developing and the crop is healthy enough to handle a short, targeted potassium treatment.
How much GreenPlanet Horti rawK should I use?
The recommended rate is 1–2 grams per litre of water. Starting at 1 g/L is sensible if you are unsure how strongly the plant will respond, while 2 g/L is the upper end of the manufacturer's stated range. Horti rawK is exceptionally concentrated, so there is no benefit in exceeding 2 g/L. Measure the powder by weight with a digital scale rather than estimating with teaspoons.
How do I use GreenPlanet Horti rawK in hydroponics?
Remove the existing nutrient solution, mix Horti rawK into fresh water at 1–2 g/L, then circulate that solution through the hydroponic system for up to 48 hours. After the treatment, flush the system and replace it with a fresh normal nutrient solution. Do not leave Horti rawK in the reservoir beyond the recommended treatment window, because it is designed as a short potassium application rather than an ongoing hydroponic feed.
Should GreenPlanet Horti rawK be mixed with normal nutrients or boosters?
No. GreenPlanet specifically instructs growers to use Horti rawK with water only during its dedicated application. Do not combine it in the same solution with bloom nutrients, PK boosters, Calmag, carbohydrate additives or microbial products unless GreenPlanet provides specific instructions for your system. Because Horti rawK already delivers an exceptionally concentrated potassium dose, stacking other nutrients can push EC and nutrient ratios much higher than intended.
Can GreenPlanet Horti rawK raise EC or cause nutrient burn?
Yes. Horti rawK can raise EC and PPM significantly because its 0-0-62 formula delivers a large amount of dissolved potassium salts. Excessive use can cause tip or edge burn, salinity stress, reduced water uptake and nutrient imbalance. Too much potassium can also interfere with calcium and magnesium uptake. Monitoring EC is especially useful in coco and hydroponics, where changes in nutrient strength can be tracked more directly.
Can GreenPlanet Horti rawK be used in soil, coco and hydroponics?
Yes. GreenPlanet supports Horti rawK for soil, soilless substrates, coco and hydroponic systems. In soil or coco, dissolve 1–2 g/L in water and use it as the standalone late-flower application. In hydroponics, follow the separate 48-hour reservoir treatment and flushing procedure. Living-soil growers should note that Horti rawK is a concentrated mineral potassium salt rather than a typical biological or low-salt soil amendment.
How should I mix GreenPlanet Horti rawK correctly?
Weigh the required amount with a digital scale, add it to water and mix thoroughly until fully dissolved. Do not sprinkle the dry powder directly onto soil, roots or growing media. Room-temperature water is normally sufficient. If your system requires pH control, check the final pH after the Horti rawK has dissolved. Use the manufacturer's gram-per-litre rate as the primary dosage and treat EC as an additional monitoring tool rather than a substitute for accurate weighing.
Do I need to flush after using GreenPlanet Horti rawK?
Yes. GreenPlanet instructs growers to leave at least one final week without Horti rawK before harvest. In hydroponics, the system should also be flushed after each 48-hour rawK treatment before returning to fresh normal nutrients. Do not continue repeating the product indefinitely if flowering takes longer than expected. It is intended as a limited late-stage treatment, so work backward from the expected finish date and preserve the final flush period.
What is the difference between Horti rawK, Bud Booster and a regular PK booster?
Horti rawK is a potassium-focused 0-0-62 finishing additive with no nitrogen or phosphorus. GreenPlanet Bud Booster is a different flowering additive with a 1-50-30 analysis, while conventional PK boosters supply both phosphorus and potassium. Horti rawK has also previously been marketed as Dense or Dense Bud Compactor in some markets. Because these products serve different nutritional roles, do not assume they should be mixed together in the same application.
Can GreenPlanet Horti rawK fix a potassium deficiency or nutrient lockout?
Horti rawK supplies a very large amount of potassium, but it is not a general-purpose deficiency remedy. Symptoms that resemble potassium deficiency can also be caused by incorrect pH, excessive salts, damaged roots or nutrient antagonism. If potassium is already present but unavailable because of lockout, adding more may make the problem worse. Diagnose the root-zone issue first and use Horti rawK only when a targeted late-flower potassium application is appropriate.
Is GreenPlanet Horti rawK organic?
No. Horti rawK should be treated as a concentrated mineral fertiliser rather than an organic dry amendment. The manufacturer lists its potassium source as muriate of potash, also known as potassium chloride. That makes it highly soluble and effective for short potassium treatments, but it may not suit growers following strict organic, low-salt or living-soil programs where concentrated mineral inputs are intentionally avoided.
How should GreenPlanet Horti rawK be stored and handled?
Keep the container tightly sealed, dry and protected from moisture and contamination. Use clean, dry measuring tools because exposure to humidity can cause the soluble powder to clump. Gloves are a sensible precaution when handling concentrated dry fertiliser, and you should avoid getting the powder in your eyes. Wash your hands after use and keep the product away from children. Follow any additional storage or safety directions printed on the packaging.
Who is GreenPlanet Horti rawK best suited for?
Horti rawK is best suited to experienced growers with healthy late-flowering plants who want a highly concentrated, standalone potassium finishing treatment. It is simple to mix but not especially forgiving because inaccurate dosing or unnecessary stacking can push EC and potassium levels very high. It is optional rather than essential, and growers whose plants already have adequate potassium may gain little from adding more while increasing the risk of salinity or nutrient antagonism.
