Auto flowering Sour Diesel

These are just really bad genetics from a low quality breeder. Coco needs to be evenly and thoroughly moistened. It is not a watering issue, it is a bad breeder isssue. BTW, never grow in clear cups, plant roots need complete darkness to grow properly. Start a diary, the more info you provide, the better the answers will be.

to dry saturate the whole cup in water not to much

Were you digging around in that seedling cup? if so, don't do that. Hands-off.. don't let that OCD control you. You shouldn't have to water before the taproot is well formed, beyond the initial irrigation you do before sowing the seed. Here's what i'd suggest: 1) Water seedling pot. Let it drip a bit, if you can but if in a rush or whatever it's okay to plant the seed right awy too. I like to let the seedling pot sit for 15-30mins and some excess water drips out the bottom. I compress a 1/2" deep hole - this way the base will not allow a seed to sink deeper into substrate. Loosely cover and let it doe its thing. Observe but don't touch, lol. 2) Before it sprouts, use a humidity dome. This will prevent evaporation. you will not need to water it for quite a while. 3) When it sprouts, remove the dome (unless in an incredibly arid climate, you don't need it... it's function was to delay 'next' irrigation) Now, you should still have at least 2-3 days before that little seedling pot requires an irrigation. Your tap root will be deep and spreading out by then. No worries about damaging it when you do irrigate a few days later. Impossible to overwater doing this. Wait for that top layer to start to dry and irrigate. simple as that. In future irrigations with a more established plant you can allow more dryback to occur to avoid the wrong kind of microbes growing on your substrate or in it. Obviously never let the plant wilt - that is waiting too long to irrigate. In flower you can irrigate a bit sooner and make use of a more robust root mass. ----------------- Due to missing information i tried to cover the bases for both soil and coco coir. Not sure if that is soil or coco coir. If it is soil, maybe the initial charge out of the bag is too hot for seedlings? soil holds a bit more water per volume than coco, so you want to mix it with about 50% perlite. This makes drownign the roots nearly impossible unless you run water through the pot for 10-15mins or longer, lol... obviously nobody sane would do that, lol. Is that coco coir? you want 33% perlite, give or take (same as above, virtually impossible to drown roots with 33% perlite and coco coir). While this is a good suggestion, absence of proper drainage qualities is not the cause of your seedlings dying. I also note the seedling looks a bit odd. If you got a bad batch of coco coir (not washed or more importantly buffered properly) it can be quite toxic to plants, especially seedlings. coco coir is convenient. I used it for 2.5 years, but the risk of a bad batch pushed me back to mixing promix+vermiculite. It's abit mor work but i never make my plants sick anymore, lol. coco coir is a hippy substrate that requires a lot of work not to be toxic to a plant. It tries to sell itself as environmentally friendly, but the opposite is true - huge waste of fresh water to wash it and all sorts of nasty runoff fucking with ground water to buffer it. Use at own risk. It may take years to run into a 'bad' batch, to put into perspective. anyway, looks like a bit of a salt toxicty to me. Those seedlings look bad, lol. Something is fucking with them and likely hurting the ability to survive. Usually the brick coc coir does not come buffered. cocoforcannabis has a guide for buffering coco coir, if interested. Their guides are all filled with good, factual information and the minimum amount of bro-science compared to 95% of other marijuana-growing sites. Read them all. read dr photon's corner posts etc. the user-submitted stuff is as sketchy as everywhere else, though. If this is coco, you should be fertigate every single irrigation after the first. 1.3-1.5EC of a well-balanced diet with 10% waste water runoff from pot, not including your tap EC/ppm. This will never harm a seedling as it is a light concentration but provides is high enough to provide all the nutrients at critical levels around the roots. The runoff ensures that these 'critical levels' reamain consistent - impossible for buildup in substrate, but if overfeeding can still cause a toxicity in the plant -- but a simple formula adjustment fixes it - observe and adjust. When you do that, good things happen. Soil doesn't work that way... you fertilize every other or every third irrigation. runoff is not necessary of not overfeeding. More trial and error as far as supplementing what is used up first in the soil and then feeding more fully later on as the nutrient charge that came in the soil is all used up. so, go read those guides on cocoforcannabis.com... you'll definitely make use of it and hasten your learning process. (even if that isn't coco coir, it's great information)