That’s a 100 pixel by 100 pixel black image, with a single white pixel near the centre. If you weren’t clear on the term before, hopefully you can see where it comes from now: a ‘PPM’ is a single unit (say, a millilitre) of any given substance per million units (one million millilitres, or 1,000 litres) of another substance.Īs you can see, that’s a tiny ratio. That’s a 2:1 ratio of water to rice, or two parts water per single part rice. For every cup of rice, you use two cups of water. If you’ve ever cooked rice, you’re probably familiar with ratios. In fact, a percent is a ratio of one part per hundred, or ‘cent’. As its name suggests, a PPM is simply a unit of measurement, like a percentage. PPM, or parts per million, aren’t really a class of nutrient or an ‘ingredient’ in any true sense. Next, let’s get to the science of soluble nutrients and cannabis growing. Both effectively measure PPM, though EC readers require some basic math to convert their units to PPM. TDS stands for Total Dissolved Solids, while EC stands for Electrical Conductivity. PPM are measured using a TDS or EC meter. Measuring PPM matters because cannabis plants are extremely sensitive to proper nutrition. PPM does not measure the type of soluble in water, only the total amount. It’s a way to measure tiny amounts of dissolved nutrients in water. By concentration, we’re referring to how much of any nutrient, or ‘soluble’, is dissolved in the water you feed your plants with. PPM stands for Parts Per Million, a measure of concentration. Our growing system is scientifically calibrated to provide the ideal nutrients at the right time. Organic soils are too comple-x to be analyzed with ordinary PPM readers.PPM is a measurement of nutrients in the soil or growing medium.Understanding these concepts isn’t the easiest thing in the world, so we’ve decided to write a definitive guide in three parts: the 10 second Cliffs Notes, 30 second explanation, the two minute talk, and the five minute deep-dive into the world of PPM. Lately, we’ve had many novice growers ask us to explain PPM, TDS and EC readers, and how they all work together to help you grow better cannabis.
While we try to make cannabis growing as simple as possible, some technical terminology is just unavoidable.
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