Yellowing/purpling of leaves in young plants

Hello! This is my second grow, my first one didnt turn out to well so I'm hoping I can get some tips here to improve this round. So to begin, last Saturday I bought two Phantom Cookie clones from my local dispensary and transplanted them into 5 gal buckets with a coco/perlite mix under a 600w MH. I watered them a little after i transplanted, and have fed them twice with general hydroponics flora series recommended feeding schedule for the second week of veg since then. I've cut off some of the older growth that got droopy after i transplanted, but since then some of the leaves have yellowed with almost purple spotting starting in the tips of the leaves. Any idea what this is and how to go about combating it? Thanks guys

just out of curiosity why dont you just pick up a bag of decent potting soil? your using a soiless mix which can be a difficult medium for a beginer. first of all you need to maintain proper PH and also soiless mixes have no nutrition for plants so they are relying on what you give them...this is fine but it is extremely easy to mistake over feeding for under feeding and visa versa. with a good potting soil you shouldnt even need to worry about nutrients for at least 4-6 weeks after you put your clones in the soil.

right now your plants are working on root growth...i would suggest verry verry light feeding for first 2 weeks...maybe 1/8 of the recomended feeding on the bottle (never ever dose plants with recomeneded dosage anyways always start at 1/4 strength and work your way up)

my personal recomendation if you want to see a good easy sucessfull grow i would ditch the soiless mediums for now and go grab a bag of good potting soil. fox farms puts out a tried and true soil (i have used it myself personally) and get them into some dirt....then forget about feeding untill they start growing...they need to develop roots first.

the mix you have needs to be watered thouroughly untill you have good runoff..this washes out all excess salts from fertilizer and allows proper hydration of the medium.

if you have fed them twice in 1 week at that age its too much.

give them a good watering of plain water with lots of runoff....then in 4-5 days (or whenever the containers pass the "weight" test) or next watering give them the same treatment only with 1/8 recomended dosage nutrients...again allow for some runoff (dont need alot when using nutrients as its a waste) then alternate every other watering with plain water and bring the nutrient dosage up 1/8 at a time..your medium will dry out rather fast depending on room temps and other variables.

i do believe what you see is the start of nutrient burn but like i said earlier its hard to distinguish the 2.

also make sure you are PHing your water EVERY TIME.....your growing a style of hydroponics and PH is extremely important.

To get runoff Id have to use a half gallon + per plant, that seems like a lot for plants this young, is that okay? When I was researching before my first grow I read of issues with gnats in fox farm soil which is why I went with coco/perlite.

To get runoff Id have to use a half gallon + per plant, that seems like a lot for plants this young, is that okay? When I was researching before my first grow I read of issues with gnats in fox farm soil which is why I went with coco/perlite.

this just looks like a really bad Magnesium deficiency that's starting to lock up.

What kind of water are you using? Tap? RO?

if your using RO, are you using some sort of calMag supplement?

You need to check your runoff PH like everyone has said. wait until they need water to do it.

But I'm guessing Mg first, then maybe PH. maybe both.

FF dirt is just fine, but where are you getting it from? is it being stored outdoor in direct sunlight, amoungst all the other shit fertilizers and soil at a nursery? or is it from your local hydro store, stored inside, in cool temperatures, and is most likely fresher? It's super important to know where, and how your soil was stored before you buy it.

I personally like the Roots Organic soil mix. It just seems more consistent than FFOF, IMO of course.

Support your local hydro store!

I'm using tap water with a little flora micro. I'm ordering a ph meter asap to better monitor the levels of runoff and what I'm putting in

whats your pH of your water with and without food and ppm level when feeding?

i always use fox farm soil NEVER had any bug issues

go back to the fox farm dude

i flushed them out yesterday, took a little over a half gallon each. the one thats more affected got even more purple. im wondering if i should just order a 1.5 cu ft bag of fox farm ocean forest and start over with different clones.

when you flushed whats was the ph and temperature of the water?

It was about room temp, I honestly couldn't tell you the ph, I'm waiting on the meter in the mail

phosphorus deficiency
Cold wet soils, acid or very alkaline soils, compacted soil. any of these ?

possibly cold and wet soil, phosphorous deficiency was my first guess. with what other people have brought up i'm guessing its most likely caused by some ph issue.

I watered again, a half gallon each with light nutrients and used my new ph meter to dial it in at 5.8. I cut the bad looking leaves off this morning. Theyre starting to canoe a little and the tips of the top leaves looked a little burned. I wasnt sure if this was nute burn or if the light was too close so i moved it to 24 inches above the tops.

WGood luck with your plants mate. Check if the light is too close with your hand - palm down - . If its too hot for your hand,adjust it. If not you' re good
. Also going with soil is much much easier than feeding nutes every now and then. A good light mix would do the work perfectly for
these clones. No nute burns, no deficiencies..everything covered for a month..at least that's what i do. I m doing my first grow right now
and everything goes smooth. I wish i could have more space..) Going simple is much safer imo. Im no expert..but i know this much..

( light mix regarding nutes amount )

Yeah my next run is definitely going to be in soil. Is the canoeing/ burnt tips an issue I should be worried about?

I am not very experienced grower, I am more of a theoretical! But in this situation I would get a little air pump + liquid silicon and Ph down solution. As a tap water mainly has high Ph level, so, it has got to be reduced for flush, you will need to run your air pump in your water for a few hours. So that will bring Ph level down to neutral which is 7 (+-0.2). Than flush with this water, 3-5 litters at the time so it doesn't drown, wait until all runoff comes out and check Ph level as well as PPM. Than do it again and again, until your runoff Ph gets to around 7 and PPM to 100-200. Let your plant drain for few hours away from your extreme lights. Oxidize water (1 x your pot size) with you air pump same way you did for your flush, until it gets to neutral Ph level. Than add your nutrient mix (no more then 1/4 of the recommended dose), most of the fertilizers are bring your Ph level down to extreme levels, this is why you will need to add liquid silicone to raise Ph up, (also liquid silicon has some very good healing effects on plant so add it in any case). Check your Ph level again, your goal is Ph 6.6 (this is for soil, google recommended Ph for your grow medium). All you need now is adjust your Ph with liquid silicon, or reduce with Ph down solution but be careful as this solution is 81% phosphoric acid and it can burn you skin. Also add 1 drop at the time than mix it well and check Ph, do it that way until you get to Ph level you need. Than water with you nutrient solution, wait until all runoff goes out, and it's ready to go back under your light. Hope that helps.
Also important, when you water with your nutrients make sure not to get any water on your leaves, as it will leave some brow spots on the leaves!