She is a good model if your seedling suffers any CalMag issues. Gradually increasing the EC in this fashion allows plants to tolerate and then thrive under higher EC conditions where it is best to keep them through the rest of the grow. Seedlings and clones in coco should be strong enough to handle a light breeze at this stage. At mid flowering about 1 ml of a 1 liter watering can of water is nutrients. GMO wrote:Hey dude couple things; TDS/PPM conversions to EC have massive variation from like 0.5 x up to like 1.2x PPM to EC depending.... so talking in PPM ive read that coco wants between 150-350ppm of just Calcium to fore fill the CEC requirement of the medium and leave enough for plants to have access to.... which is where the calmag buffering usually comes into play a pre … The seedling bags create an ideal environment for young roots, however the solo cups are somewhat easier to transplant out of at the end of the seedling stage. The optimal pH and EC values for cannabis cultivation are contingent upon three factors, the growing substrate, nutrients and water. Roots Out from the bottom of seedling Bag! Seedlings must be started with a nutrient solution that is very low strength as measured by Electrical Conductivity (EC). In most cases, they will be ready to be transplanted out of their seedling pots and into the next home. Generally, hydroponic fertilisers perform better than most brands' organic soil nutrients in coco coir. This tutorial covers the roughly two-week period of the seedling stage. The coco will take its share of the calcium and magnesium before the plant has a chance, so if you do not provide enough, the plant will suffer. Whether a cannabis plant is planted in soil, coco, or hydro, pH levels need to be maintained to optimal levels. Ideally, you should plan to water your cannabis plants in coco 3-5 times per day during the flowering period. Fertigate twice: #1 EC 851, pH 6.1; #2 EC 902, pH 6.1, Roots out from the bottom of seedling bag! Relative humidity (RH) is always important to control because it affects transpiration. Using EC and pH meters is almost mandatory if you choose this media, since you have to carefully check this values before watering your plants. During the seedling stage the relative humidity should remain high, 65 – 80% and the temperature should be moderate, 72-79f (22-26c). I like to have the light-off period occur during the daytime rather than at night because this makes it easier to maintain a consistent climate. If symptoms deteriorate despite the foliar treatment, then you should substitute CalMag water in place of the regularly scheduled nutrient solution. If your starting water ppm is too low it causes the ph in the run off to go down. The buffering process is crucial to prepare the coco for plants, and especially seedlings. It’s a little intimidating. Even if you are well prepared, you may encounter issues with calcium or magnesium deficiency during the seedling stage in plants grown in coco. But the most reliable methods, and most widely used, is EC. Plants can only perform photosynthesis when they have access to micro and macro nutrients. While hydro and coco growers should aim for 5.8pH, or at least maintain pH around 5.5-6.1. Young seedlings have underdeveloped leaves that cannot yet process high levels of light energy. We welcome all growers who want to learn, share and grow together! If you still have a dome or cup over your plants, they should be removed now, and a light breeze applied to the plants. The products that we recommend are the actual products that we chose to purchase and use ourselves. Why is pH important? Vegged between 4-500, nothing burnt maybe a lil light! However, you can mix a smaller batch, just add enough CalMag so that the EC is 800. pH should be above 6.2. Fertigate twice: #1 EC 976, pH 6.0; #2 EC 1012 (Full strength), pH 6.2. We recommend growing sprouts first in a Rapid Rooter or Jiffy Pellet before transferring to coco. Our growing system is scientifically calibrated to provide the ideal nutrients at the right time. Easy to follow instructions to produce great weed plants for novice growers and experts alike. When seeds first sprout, they use energy that is stored in the seed for their initial growth and development. Im using coco mixed with perlite for my grow atm, they are in week 3 of flower, however i noticed that my runoff ppm is way lower than it should be. However, if you follow the high frequency fertigation which we recommend (See “How to Water Cannabis in Coco”), the plants will produce sufficient humidity once they get into their final containers. Growing weed in coco coir is a great way to to produce high quality marijuana for new and experienced growers alike. However, both hydroponic and soil pH levels should stay within the same optimal range of 5.5-6.0 pH. This allows you complete control of their RH as long as they fit in the dome and you use a hygrometer. Buffering the coco allows you to satisfy the majority of the cation exchange sites. The following two timelines are offered to give an understanding of a specific application of the principles outlined in this tutorial. For soil growers a pH of 6.0-6.5 is perfect. Before proceeding here, be sure to see my video and read our tutorial, “How to Mix Nutrient Solutions for Cannabis”. Use this Canna Coco feed schedule and grow guide to grow killer marijuana in coco coir. I've been feeding them PH 5.8 tap water with weak nutes, rhizotonic and every 3rd feed 1ml of calmag. Once I have the gallon mixed, I pour a small amount into a separate container and then dilute that with filtered or bottled water until I reach my target EC for that fertigation. Plants can absorb calcium through their leaves and in this way the plant can get it without having to compete with the coco for it. However, once the root is in media and the head emerges from the Rapid Rooter or Jiffy Pellet, the lights should come on. I mix one gallon of full strength seedling blend solution prior to the first fertigation. Around 400. This is because young seedlings have underdeveloped roots and it can be difficult for them to pull adequate moisture from the soil. This will limit the plants ability to sustain optimal photosynthesis and growth. (also a calculator on Canna site) You can just reduce EC/ppm a bit in the orange case, the blue are good for all the cycle, coco increase the salt in a way (built up). Seed placed between wet paper towels in sealed container, Seed with tail transferred to Jiffy Pellet, Root Emerges, Jiffy Pellet transferred to seedling pot with pre-fertigated coco/perlite: Coco for Cannabis Seedling Blend: EC 400, pH 6.3, Fertigate twice: #1 EC 459, pH 6.23; #2 EC 464, pH 6.3, Fertigate twice: #1 EC 544, pH 6.1; #2 EC 612, pH 6.0, Fertigate twice: #1 EC 702, pH 6.2; #2 EC 772, pH 5.9, Plant has two nodes working on third. During the seedling stage it is particularly important to provide nutrient solution that is the correct strength as measured by Electrical Conductivity (EC). Continue the foliar treatment until the seedlings are on the full-strength seedling blend. Small plants in big containers can take a long time to dry out. Buffering with a strong dose of CalMag prior to using the coco allows you to provide relatively little CalMag during the seedling stage of the grow. JavaScript is disabled. When I begin a grow, I prepare and buffer enough coco for the final containers. As I explain in the articles “Growing Cannabis in Coco Coir with High Frequency Fertigation” and “Understanding EC, PPM & TDS for Growing Cannabis”, fertigation always requires a balance. However, it may take longer, so be patient with your little seedlings and listen to what they tell you. Please see our Product and Equipment Guide. As I explain in our article, “Transplanting Cannabis Plants: Why, When & How”, there are significant benefits to starting plants in small containers. If you have a lux meter or quantum meter, you will want to keep your seedlings between 8000 – 20,000 lux or 100 – 300 umols PPFD. A few small issues but nothing they can't bounce back from. “Blueberry” from Seedsman was a fast-growing seedling. However, if managed poorly, the plant can become stunted and never live up to its potential. Hence, this tutorial covers roughly days 3-15 from seed. The seedling stage runs until the plant has three true nodes (sets of serrated leaves). However, buffering solutions themselves have a high EC, and seedlings could be burned if they are placed in coco fresh from the buffering process. The fertilizers that we provide allow the plant to conduct photosynthesis efficiently, but they are not “food” that plants “eat” for energy. “Blueberry Kush” from Grower’s Choice Seeds took a little longer to germinate and then suffered minor calcium deficiency as a seedling. PPM & EC. If it's going up your starting water quality is too high in dissolved minerals. It is best to use a pressure sprayer to apply the foliar as this will deliver a fine mist, however, you could use any spray bottle. 250-300ppm will be enough. I recommend beginning to fertigate (add fertilizer to the irrigation water) when two conditions are met: If the cotyledons are already open prior to transplanting into coco, then it is a good practice to presoak the coco in the seedling pot with nutrient solution at the appropriate pH and EC prior to adding the seedlings. 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. There are several key steps to follow to ensure that you mix solutions in the correct order and which have the correct Nutrient Element Ratio (NER), are the correct strength as measured by electrical conductivity (EC), and which have the correct pH. If you rinse your coco coir more than three times and it’s still showing 450 or more ppm, and/or the pH is out of range, do not use that coco coir. Seedlings in coco coir grow far faster if you start them off with seedling-strength nutrients from the beginning! Be sure to follow the growth and development of your plant to determine how to care for it. Grow Your Own, But Don't Grow Alone... Let's Grow Together! If the seedling is not getting enough light it will stretch and quickly grow vertically. According to growpotcheaply.com and his feed schedule, he is recommending : Days 1-7 .6ec -- 300PPM Second fertigation is Seedling Blend EC 904, pH 6.3, Plant has two nodes. When you do this, you need to be sure that the CalMag water has the same EC that the water it is replacing would have had. If plants are too cold or too hot, growth will be reduced as biological processes, especially photosynthesis, are directly influenced by temperature. Adding a wetting agent to the foliar solution is optional. then slowly taper off. Soil is a more forgiving medium and acts as a buffer for the root zone. Thanks again!!! As the plants start maturing during the seedling stage, it is time to work your way through a transplant strategy. If the parts per million reading is higher than 450 ppm, and/or the pH is wildly out of range, repeat the experiment to see if you can get runoff water that’s less than 450 ppm and within pH range. Calcium and magnesium deficiencies are common problems with plants grown in coco. This should not be a problem early on. When plants are still seedlings, the amounts needed for each fertigation event are very small. It is especially difficult to deal with CalMag problems during the seedling stage. During mid flowering stage, cannabis plants like a PPM around 1000. Keeping higher relative humidity reduces the stress on seedlings. PPM, TDS, and EC in 30 Seconds PPM stands for Parts Per Million, a measure of concentration. When the root emerges, we recommend placing the plants into either fabric seedling bags or solo cups with prepared coco. If you can buy filtered or RO try that. I use a giant 60ml oral syringe to fertigate my little seedlings. You can use various strategies to achieve the correct RH. Soil – water with plain, pH’ed water at 6-7 pH, no nutrients , for the first 3 weeks or so – your plants will be able to live off the nutrients in the soil, and adding extra might be … Therefore, it is best to avoid any fertilizers and keep germinating seeds and sprouts in low EC water. I grow in coco so I can see how they react within a day or 2 normally. The amount of water needed for each event is very small because the seedling pots are small, and you never allow them to get very dry. Therefore, during the seedling stage, it is best to keep the intensity of light low. If Your Coco Nutrients Don’t Contain This, They Might Starve To Death… As we discussed, until now, because coco binds to calcium and magnesium, you had to risk starving your plants of these critical nutrients… Many growers tried adding extra Ca and Mg using cal-mag supplements… but it’s hard to dial in the ratios just right… The Coco for Cannabis Seedling Blend Recipe will produce a nutrient solution with an EC of about 1000. Decisions to use cannabis should be made in consultation with your doctor or medical professional. The first couple of fertigations should be at an EC of only 400. My ph going in is also at 5.5. There's no need to use CalMag though, especially not the Mg if you're using proper (complete) nutrients already . Check out our Product and Equipment Guide for our Recommended Grow Lights, Grow Set-up Equipment, DIY Projects, Germination Supplies, Plant Training Supplies and everything else you will need during the grow! The humidity and temperature are very important during the early stages of growth with seedlings. If 1 PPM is 1ml per 1000 liters, a PPM of 1000 means 1ml per 1 liter. Water ppm readings have applications for both hydroponic and conventional soil cultivation methods. For those crucial first 3 days, be sure to see our tutorial "Germinating Cannabis Seeds - a Step-by-Step Guide". Fertigate twice: Full Strength Seedling Blend EC 1000, pH 6.1. Be sure to see our tutorial, “EC/PPM Targets for Fertigating Cannabis”. Coco is an inert medium, therefore, the plant only receives nutrients if we provide it with the irrigation water. To handle the next stages of your grow like a pro, be sure to see our article/tutorials, "Transplanting Cannabis Plants: Why, When & How” and “Why You Should Train Cannabis Plants”. We advise strongly against placing small plants into large final containers. Knowing your PPM helps you avoid possible burning by letting you know when to adjust the amount of nutrient minerals you add to your water. If you use solo cups, be sure to cut numerous holes in the bottom of the cup to allow drainage. We do not accept sponsorship or advertising and will not recommend any product that we would not buy for ourselves. During vegetative growth we recommend keeping RH 60-75% (See, “The Best Environment for Growing Cannabis”). You can do this at up to every other fertigation depending on need. Coco should never be allowed to get very dry. Everything you read from people says to gradually increase every week until you're close to or over 1000ppm. Be sure to see our tutorial, “How to Prepare and Buffer Coco Coir”. For complete instructions and photos of the process be sure to see "Transplanting Cannabis Plants: Why, When & How”. 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