That would actually totally depend on the water that you use.after adding nutrients to the water I use say first week of flower my pH dropped to 5.3 so I need to use pH up to get to 5.8 and someone I set up not long ago had well water and his pH was 7.1 after adding the nutrients
GH Base nutrients are formulated to hit pH 5.8 but will vary depending on water source. Nutrient absorption does have a wide pH range so small fluctuations should not be a worry.
http://www.spliffseeds.nl/images/stories/spliffseeds/en/blog/pH-EC/pH-Cannabis-Nutrition-1.png?i=312
Havenāt found a good chart but high PPM is the concern and thatās why soil/soilless growing can be much more complicated because the media can hold the salts and require water flushing to get into the proper range. Below 1500PPM as I have found in personal experience and research.
I think that just about anybody on here would agree that having your pH in the sweet spot is key to a good harvest if you have the ability to check the pH why not get it right . It seems you and I donāt see eye to eye on what is easier for a beginner my opinion is that it is easier to get everything as good as possible and try to avoid any possibility of issues that need to be resolved later in the grow. Your idea of easy is to spend as little as possible and hope for the best .if I didnāt have the guy with well water pH his solution he would have had problems with a pH of 7.1 in hydro @WickedAle
PH 7.1 definitely would effect manganese and boron absorption essential for early plant growth.
Iāve just seen too many ppl here driving themselves crazy trying to constantly re-adjust their pH not realizing they have an effective window when itās really because they have a PPM problem because of over feeding.
Yes we do have different approaches.
Boron (B) is vital to plant health, due to its role in forming and strengthening cell walls. Low boron levels lead to poor growth of fast growing tissues and plant development. Different plants need different amounts of boron, but for the most part, boron is not easily transported within the plants. For that reason, boron should continuously be available for uptake by the roots, and especially prior to flowering, as it is vital to the reproduction process.
Manganese (Mn) is an essential plant mineral nutrient, playing a key role in several physiological processes, particularly photosynthesis. Manganese deficiency is a widespread problem, most often occurring in sandy soils, organic soils with a pH above 6 and heavily weathered, tropical soils. It is typically worsened by cool and wet conditions (Alloway 2008). The impact of Mn deficiencies includes reduced dry matter production and yield, weaker structural resistance against pathogens and a reduced tolerance to drought and heat stress.
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These are the ph and ppm of the 3 plants in soil: plant A 7.18 1024, plant B 7.03 1045 and plant 3 7.17 1096.
Thatās the runoff data I was asking for? Seems a little high.
Yes that I know, this is why I have flushed and stopped all nutes. Just straight up h2o.
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Can ppm be controlled in DWC? If so how?
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By the amount of nutrients you mix into solution.
Ok, but if you are using in my case, GH, 1-1-1 tsp ratio per gallon of water. I will not now ppm until after solution is mixed. Example I used above ratio in 4 gallons of water phed to 5.8 ppm was 857. According to drain to waste schedule, my ppm is high. How do I lower?
If youāre in dwc Iām not sure you would use drain to waste schedule.
I was just looking back at your comment I should visit the drain to waste schedule. I guess you meant for soil then?
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Yes, based on pic you posted last weekend.
OK. So in DWC what PPM range should I try to maintain?
In general for all types of plants and growing methods you should watch the plants for feedback. Thereās a lot of variables as to how much of which nutrients plants will use at different periods of a grow. You should probably get feedback from one of the other dwc growers or visit those schedules for guidelines. I see dwc systems run really good over 1000ppm for flowering plants, and some like to keep them around 800ppm at the same stage. Vegging plants a little lower.
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I run mine at 1100PPM and no signs of nute burn. Iāve had the tips burn when the plants do drink quite a bit of water and I do not top up with water but thatās about it.
Yes you would use the drain to waste schedules, but do not use the organics solutions in DWC or you will grow bacteria. I just use the base nutrients and som armor Sl in flower to stiffen up the branches.
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