I dont know off the top of my head how long flowering is for jack herer but it only starts from when you go to flowering lighting a quick google says 8-10 weeks so you have to research about harvesting etc have a read of this https://www.growweedeasy.com/harvest
Depends on the strain an phenotype from 8 weeks to 12 total I would just watch them after 8 weeks and check thrichomes if you have to go by 70 percent brown hairs but I would recommend getting a jewellers loupe or a USB microscope I use the USB ones an they are really good
to be fair if you had said your ph was correct I would have assumed it was hungry lol I had a similar problem with yellowing on my plant recently but my ph was opposite dropping low and because of lockdown I couldn't get ph up so iron among other things were getting locked out and it was...
I am a hydro grower I use ph down but I think there are a few organic ways in soil a quick google should find I think dolomite lime lowers and also buffers it but someone else would know more probably Citric acid vinegar etc but that would be more phing the water before it goes in there are a...
Yeah lights being close can do weird things that light is pretty small but I have no experience with small lights I always have my light high as it’s quite strong an I have seen the symptoms of it being too close you will see it perk up pretty quick if it was the light to close
https://www.indoorgrowingcanada.com/collections/analysis-instruments/products/general-hydroponics-ph-test-kit-1-oz that will do fine I dont like the test strips, you can but you have to be very careful of watering its probably easier to start as small as a party cup at first so it can dry out a...
I use paper towel in ziplock method for germination never let me down an easy to check on but each to our own, ph drop test kits are a must imo you can get a meter but drops are alot more reliable just not as pinpoint accurate in soil you shouldnt need anything crazy alot of ppl dont even bother...
if your using led it can cause purple can also be nutrient uptake but most times it will grow out of it. Strains can also have purple in their genetics. Unless its growing slow or causing more problems I wouldnt worry