Runoff ppms 2400 when to flush and when to feed after?

if you have an EC option on the yinnik pen, use that over ppm when discussing with others. there are 3 differnet conversion factors used to translate EC to ppm, which is what the pen is doing. depending on the manucaturer, the ppm will display differently even with the same EC... ec is apples to apples when discussing things related to ppm. ppm from these simple pens are not. i have a conversion table in my google drive shared folder, if this doesn't make sense - link is in my GD profile 'info' page at bottom in the comment section. sort by newest first. i'm not familiar with your brand. it's somewhat regional, but more manufacturer related. in NA it'll be "500 scale" .. europe is more likely a 700 scale, i believe.

a one-time flush won't cause a problem. that sort of thing is a problem if it is habitual. and, as we see with ppl doing 3x/day fertigation setups, constantly moist is doable. 70/30 coco/perlite or 5050 peat/perlite will have excellent drainage properties that can mitigate flushing slightly early compared to your normal wet-dry cycle. just don't make a habit of it. also, measuring runoff is a bit art and a bit science. forma baseline before reacting to anything... does it normally rise? does the plant show any symptoms? maybe, symptoms several weeks down the line? runoff will likely measure higher than what is in the pot. so, don't assume a threshold of danger... find it. observe plant. take notes. do better next time armed with good information.

in a soilless grow you shouldn't have much buildup, if religious about 10% runoff waste and send it down the drain or outside -- don't let it sit in it's runoff. if buildup is occuring, that means you are feeding it more than it can metabolize. again, only for a soilless/hydro context of chelated and 100% plant available fertilizers used. if it took several weeks to occur, that's not a bad thing. that means it's very close to the rate at which the plant is using it, but just a tad too much that over several weeks it builds up to something you can see. A slow progressing problem is the best problem to have. So, do what EZ said, run some water through it until the ppm of runoff drops back down, then continue a normal fertigation, but i'd reduce 'something' if you can figure out what is been fed at too high of a rate.. ratios of all the nutrients and concentration of each as well as total concnetration matters -- the pH you are trying to maintain has a say too. some people do 3x fertigations per day in soilless... if the plant size and pot size are properly matched, then you don't run into issues. some proportion needs to be taken in by the plant before you should fertigate again. think they say a 25-33% 'dryback' is waht you want.. but it's not drying. it's being taken in by the plant. minimal 'drying' should occur. that would increase EC of pot.. water evaporates but the minerals stay behind in a smaller volume of water. This is no big deal even if you have 3-4 days between irrigations. Be religious with that 10% runoff waste water when fertilizing. Fertilize every time at 1.3 to 1.5 EC. it should not build up, which eliminates a possibility when diagnosing a problem. Now, it's a simple formula adjustment, then wait and see... the next grow you'll see whether or not it fixes teh issue -- genetic variety makes this a constant trial and error context if trying to push fertigation as much as possible. in the end it is not foie gras. you cannot force feed a plant... well you can but it won't end up a delicacy. you are feeding too high at 1200 ppm. buildup was inevitable.

Disregard the answer from bud boutique. There is essentially no threat of over saturation in a coco perlite mix. You do not need to wait for dryback. There is no magical 3x the container size to flush with. You flush with a gallon or two and watch run off. When you’re down below 500 or so, it’s usually good. I’ll shoot for below 500 (1.0 EC) then run another gallon thru, let the runoff stop.. then give it another feed immediately after. You will have more runoff obviously, but once that feed has settled and run off from THAT feed has stopped you’re good. Now you’re getting high runnoff from either feeding too high, or letting it dryback too long. With coco you want constant saturation, and always a bit of runoff when feeding.

Hey Buddy, First of all amazing grow so far. High runoff ppm can indicate an accumulation of excess nutrients in the growing medium, which might affect your plants' health and growth. In your situation, it's a good idea to address this issue to ensure optimal conditions for your plants. Flushing can help lower the accumulated nutrient levels and restore a more balanced environment in the root zone. However, before you decide to flush, it's important to consider the moisture level of your growing medium. Flushing when the medium is too wet can potentially lead to over-saturation and other problems. Therefore, it's generally recommended to wait until the growing medium has dried out a bit. You can perform the "dry back" test: stick your finger into the medium up to the second knuckle. If it feels dry at that depth, it's usually a good time to flush. This way, you minimize the risk of overwatering during the flushing process. When you decide to flush, use pH-balanced water at around 6.0-6.5 pH (for coco coir) without any added nutrients. You'll want to use a significant volume of water to ensure thorough flushing. Generally, you'll use about 3 times the volume of the container's capacity. Allow the excess water to drain out completely. Post-Flushing Feeding: After flushing, it's important to let the medium dry out before you resume feeding. This allows the plant to uptake any remaining nutrients from the growing medium, preventing any potential nutrient imbalances. You can use the "dry back" method again to determine when it's time to water or feed again. Once the medium is sufficiently dry, you can start feeding again. Feeding Approach: When you resume feeding, it's advisable to start with a lighter nutrient solution than usual. This helps prevent a sudden nutrient shock to your plants after the flushing process. Gradually increase the nutrient strength over the next few feedings until you reach your target ppm range (usually around 1180-1250 ppm in your case). Remember to monitor your plants closely for any signs of nutrient deficiencies or excesses and adjust your feeding regimen accordingly. In conclusion, wait for the growing medium to dry out a bit before flushing, and then use pH-balanced water to thoroughly flush the excess nutrients. Allow the medium to dry back before resuming feeding with a lighter nutrient solution. Adjust the nutrient strength gradually based on plant response. Monitoring your plants' health and adjusting your approach accordingly will help ensure successful cannabis cultivation. If you got any further questions feel free to send me an DM. Have fun & good luck :)

Hi Kaydough. My advice is stop feeding with nutrients for two weeks, just use ph balanced clear water. In soil is more enough already nutrients and plant can feel comfortable for couple weeks definitely and then will go back to your nutrients.