Always keep the reservoir full at all times and add more fertilizer to maintain the EC level in the reservoir during “topping off”. Coco should be kept saturated at all times to prevent EC spikes, and these need to be taken into account when testing the feed to find the best EC for your plants. Aim to get it down to 6.2 or so. This last one is also named total dissolved solids or TDC scale. Just as the nutrition needs of a plant change during its life cycle, its optimal EC range also changes: starting low, reaching a peak during late bloom, and going down sharply at the end. The runoff carries away the excess fertilizer. Plants stop growing, staying shorter with smaller leaves. On the opposite, a low nutrient concentration causing low EC forces more water uptake from the roots. If the nutrients in the medium are at a higher EC than what is in your plant, the nutrients will force their way into the plant, causing nutrient burn and excess. As the plant continues to grow during the vegetative phase of its life, it will benefit from water with a higher PPM reading of 800-900. Maintaining moderate levels of Nitrogen, while boosting Phosphorus & Potassium to boost flower growth. You have to find the right balance, and feed the right amount of nutrients to the plant. We can then monitor the EC level to ensure that fertility levels are where they need to be. When your Cannabis plant is in its initial growth period, it will require a solution with an EC measuring 0.8-1.0, while during flowering the EC should be somewhere between 1.2-2. By monitoring the EC (Electro Conductivity) of your nutrient solution, you will have an idea of how much of the salt based nutrients are available to your plant, in turn you will know how much you are feeding your plant. Under normal conditions, the EC in the growing media and runoff should be just a little higher than the nutrient solution in the reservoir. Different varieties of cannabis might require significantly different values of EC. EC measurement is how the grower gets the most accurate reading of nutrients in feed solutions and the growing medium itself. As the water in the medium is used by the plant, and evaporates, salt based nutrients are left behind. This will help you feed them what they need, when they need it. February 10-2017. Keep in mind that it is normal for leaves to turn yellow during the late flowering stage, and it is also normal for the odd leaf to turn yellow as your plant naturally defoliates. Pro Tip 2: Keep humidity around 45%. The best way to find out the best EC for your cannabis plant, is by monitoring what you’re feeding the plants, against what they are giving you back in runoff. Some hydro growers will be using a “recirculating system”, where the runoff after feeding, will be redirected into the nutrient tank (reservoir). Electrical Conductivity (EC) Meters If the EC falls, then increase the EC of the reservoir by 0.2 points. Too much of a change in EC either way can shock the plants, so gradual changes should be made, unless there is a major problem. You’ll want to monitor pH and EC, at least weekly. The best EC values will differ depending on the foods provided and the plants themselves. Soil For the most part, the pH balance is more important to soil growers than EC/PPM values (although an EC meter is always a good investment). This is what EC is. From seed, you can follow the plant as it grows and raise the EC as it is needed. If you have reduced the EC of your feed by more than 0.4 points, the first test may show a slight raise in EC before it levels off on the second test after another feeding. Answered: EC and nutes during flowering question Hi all, I have a plant in dwc thc bomb feminised and its at day 45 of flower cycle. Tap water is not the same anywhere. The higher the salt concentration, the greater the electrical reading. When we add fertilizing compounds to tap water, these chemicals increase water electrical conductivity, and a greater concentration of nutrients in water results in a liquid, that conducts more electricity. Get to know your plant, and understand what the EC and pH fluctuations mean. What you’re looking for is the run off to come out at around the same EC as it goes in. Max 1.4 EC / 700 ppm * during Vegetative phase. It’s a good idea to run a leaf analysis at an in-state lab at about bloom set, but check with your lab about the legalities involved. 0.8-1.3 for seedlings; 0.5-1.3 for clones; 1.3-1.7 under vegetative phase; If it has risen, reduce the EC by 0.1 point. Most growers have the talent, but they lack information. In some situations, the EC of the nutrient solution is way too low, and nutrients will leach out of the plant, and into the water. Timing Hydroponic mixes without media reserves require some N during the first half of flowering (usually 3-4 weeks) and less during the next quarter (10-15 days). If the EC of the runoff is coming out lower than what you are feeding the plants, then you should increase the EC of the next feed. Don’t cut corners with the EC meter, get the best one you can afford, knowing the EC of your feed will keep your plants healthy and happy, it is worth investing in a good EC meter. Less is more! This helps the plant eat and drink more. If the BG EC is over 0.6, you should consider using reverse osmosis water, or diluting the water with mineral water to reduce it. This can cause damage to your plants roots and force your plant to take more nutrients than it needs via a process called osmosis. Hello all! Feed the seedlings, and collect the runoff as it flows out of the pot. The first exterior sign of distress caused by excess of nutrients is wilting leaves. Plants’ cells start losing water when the salt concentration is too high and the EC of the nutrient solution increases. When EC measurement is too high in the growing media and runoff, the plants are at risk. love the page by the way its deadly. Not because the mix has been made poorly, but because nutrients can alter their levels under a number of conditions. The best way to avoid problems is draining the irrigation system and adding fresh solution regularly. Letting the solution sit, will allow the salts to properly dissolve and disperse through the water. In situations like this, you can monitor the EC and pH of the reservoir, to help find the best EC for cannabis plants. For one, nutrients can build up in the grow medium or deplete in a reservoir or DWC due to evaporation.Very high EC levels can disrupt water movement in plant cells. Other symptoms such as … For example, if you’re seeing a 6.6 in your runoff during flowering, try 5.6 to 5.8 the next time to bring it down a bit, again measuring the runoff. Your plant, and grow medium, will find a steady balance between each other. Max 1.6EC / 800 ppm * during Flowering phase. Late Flowering: 1000 – 500 – 0. During this period, plants need low Nitrogen levels, medium Phosphorous levels, and high Potassium levels. The result is often fruits with a harsh taste due to the excess of salts in plant tissues during flowering stage. Example: Grower A measures an EC of 0.5 in his tap water. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. You continue this as the plant grows, until you find a nice steady balance. Real world tap water contains enough substances with H+ Cl- ions, which it make possible to conduct electricity almost like a metal cable. As a general rule, plants will have a higher nutrient requirement during colder months, and lower demand in the hottest months. Always consider, that a plant might never fully recover from a nutrient lockout or an excess of nutrients. Regularly add plain water to the nutrient solution to replace the one absorbed by plants. This can expressed as deficiencies, but the EC will show signs of over feeding. Watering frequency will depend on plant size, container size, climate, lights, and relative humidity. To raise the EC, add more fertilizer to the solution, or change the nutrient solution. If you go slightly over your desired EC, then add more water to dilute the solution. But if you’re checking EC for the first time on bigger plants, then you need to monitor the levels for a couple of feeds to get an idea of the right levels. If your pH range in coco coir is way off, flush a bunch of properly pH’d nutrient solution through your plant to get things back in line. Get around 10% runoff, and collect it as it comes out of the pots mid flow. Necessary cookies are absolutely essential for the website to function properly. Sometimes you may find guides across the internet that use PPM instead of EC. The drier the medium gets, the more the EC will rise. To check the EC of the nutrient solution for your plants, you need a good reliable EC meter. To start fertilising, the water EC should be near 0.4 (always measured in miliSiemens).This is easy to obtain if you start with RO water or rainwater (usually with an EC ranging from 0.0 to 0.2), and then simply add calcium and magnesium to the desired EC (0.4). As the nutrient ion is used, it loses its charge too. This is another way of causing an EC spike that can cause problems with your grow. This should be collected as it is coming out of the pots. Though coco is a form of hydroponics, it is treated a little differently, as it is not as easy to monitor the EC as it is in a hydroponic system. Day 36 Day 40 Day 47 The flowering stage … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Water quality is very important, and requires some work. Mid Flowering Stage: 1200-1600 This is the stage when a cannabis plant needs the most food. But, this doesn’t mean you can push your plant full of nutrients, and hope it grows bigger, a plant can only eat a certain amount. Week 1-3: The Flowering Stretch. Each plant, from each seed, in different environments, will use their nutrients differently. Nutrient balance and concentration is the first thing a grower should focus on in order to prevent their plants from nutrient deficiencies and/or overfeeding. This will indicate the dissolved ionic salts already in solution. As the roots form, and the plant grows bigger and heads into veg, you can monitor the feed to find the best EC. If no water analysis is available, an EC measurement of the overall concentration of the dissolved solids (ionic salts) is highly recommended. Hydroponic and aeroponic grow methods use direct feeding devices, which require a perfect control of the chemical compounds and values of fertilized water. Test this water, to find out what the EC level is. Keep the EC low unless your plant asks for more. For Seedlings, it should be your BG EC plus 0.2 EC of base nutrients. When new nutrients are introduced, the ones with the weaker bond, get washed away, and the new ones replace them, and the process continues. A good EC (or ppm) measurement is made by collecting water samples from the reservoir, growing medium and runoff. Plant asks for more control of the solution sit, will find a steady balance each. 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