Why am I having Phosporus deficiency around 2 weeks of seed until 12/12

50% of the time my plants 2 weeks from seed will be perfect then they get a Phosporus deficiency until I put them into flower and they recover. I use GH technaflora series in DWC. Took them to hydro guy and we basically agreed on deficiency and he gave me some stuff for it. What else could it be??

PH? what kind of water? and does it fluctuate at all?

ph is always 5.5-6.1.... Water is city and I let it sit out 1-2 days and ppm is 150.... Yup fluctuates like normal... Plant will be perfect from seed to 2 weeks or so. Then from day 15 (still in veg) until I flip to flowering and takes a few days to recover.

Meast21 said:

ph is always 5.5-6.1.... Water is city and I let it sit out 1-2 days and ppm is 150.... Yup fluctuates like normal... Plant will be perfect from seed to 2 weeks or so. Then from day 15 (still in veg) until I flip to flowering and takes a few days to recover.

Click to expand...

My plants are always as green and perfect as they can be in flower too, just the end of veg that's giving me a problem for some reason.

Meast21 said:

50% of the time my plants 2 weeks from seed will be perfect then they get a Phosporus deficiency until I put them into flower and they recover. I use GH technaflora series in DWC. Took them to hydro guy and we basically agreed on deficiency and he gave me some stuff for it. What else could it be??

Click to expand...

do you have you're seedlings straight in dwc from seed to flower ?

Meast21 said:

50% of the time my plants 2 weeks from seed will be perfect then they get a Phosporus deficiency until I put them into flower and they recover. I use GH technaflora series in DWC. Took them to hydro guy and we basically agreed on deficiency and he gave me some stuff for it. What else could it be??

Click to expand...

your issue is the plant is growing from seed in a dwc now when vegging in a dwc first u need to let the seeds grow in a rockwool for the first 2-4 weeks to get a root mass water roots and one main tap root if u are starting them in a dwc they will grow but you're roots will get what called damping off so they will not search for the water and u will lose uptake in therory now when you slam them into flower they start to grow more tap roots or anchor roots which will be thicker and penatrate deep into the soil looking for nute as they do in dwc now they are getting greening as they are getting more of a stable tap root that can take up the nutes alot better if u wanna get a better harvest seed in rockwool for the forst 4 weeks then drop into your dwc at week one of a clone well start feeding as week 1 YOU WILL NOTICE THE DIFF

rob333 said:

do you have you're seedlings straight in dwc from seed to flower ?

Click to expand...

Paper towel method 3 days then in a gro-dan cube that goes into dwc. Tap root takes about 3 days to hit the water, now into day 6 total. Running GH technaflora series with a ppm of about 400-500. Using BC BOOST, BC GROW, SUGAR DADDY, MAGICAL, AND B1-RED set ph to 5.5-6.0.... Like I said from seedling thru the first 2 weeks in veg they are fine. Weeks 3-4 they seem to be acting up or getting what I think is a phospurus defencieny. Once I get them into flower and they recover they are green as could be... Ive had this problem when I have dozens of roots or like in the 3rd week of flower.

Seen on the P nute uptake scale for hydro. P needs ph from 5.9 to 6.2 or so... If my ph was at 5.5-5.7 steady for 5 days would this cause it?? I highly doubt it.....

I need good clones that I can just put in flower... Been trying to get this 1 pheno type, but I keep getting the wrong pheno. I need the sativa version and been getting the indica version. If its not one thing it is something else. Pretty funny how I never have any problems in flower its just the veg part.

Your PH.

https://www.google.com.au/search?q=nutrient+uptake+PH+chart+for+cannabis&sa=X&rlz=1C1ASUT_enAU412AU434&espv=2&biw=1366&bih=667&tbm=isch&imgil=sDHLSu5UxF5QcM%3A%3B8XipfuBj79JWtM%3Bhttp%253A%252F%252Fwww.growweedeasy.com%252Fph&source=iu&pf=m&fir=sDHLSu5UxF5QcM%3A%2C8XipfuBj79JWtM%2C_&usg=__DWzO38qsVOrOoMUEoJPU-TLiaeQ=&ved=0ahUKEwjfkp-JidfOAhXGKJQKHTYpAwIQyjcIKA&ei=wwK8V5-lD8bR0AS20owQ#imgrc=sDHLSu5UxF5QcM:


You need AT LEAST a PH of 6.1 ish


Edit..thats for soil..heres a Hydro one. Sorry!

https://www.google.com.au/search?q=nutrient+uptake+PH+chart+for+cannabis&sa=X&rlz=1C1ASUT_enAU412AU434&espv=2&biw=1366&bih=667&tbm=isch&imgil=sDHLSu5UxF5QcM%3A%3B8XipfuBj79JWtM%3Bhttp%253A%252F%252Fwww.growweedeasy.com%252Fph&source=iu&pf=m&fir=sDHLSu5UxF5QcM%3A%2C8XipfuBj79JWtM%2C_&usg=__DWzO38qsVOrOoMUEoJPU-TLiaeQ=&ved=0ahUKEwjfkp-JidfOAhXGKJQKHTYpAwIQyjcIKA&ei=wwK8V5-lD8bR0AS20owQ#imgrc=gGe6Wl_wzxKr3M:

My answer is I have no idea!..lol

Lucky Luke said:

Your PH.

https://www.google.com.au/search?q=nutrient+uptake+PH+chart+for+cannabis&sa=X&rlz=1C1ASUT_enAU412AU434&espv=2&biw=1366&bih=667&tbm=isch&imgil=sDHLSu5UxF5QcM%3A%3B8XipfuBj79JWtM%3Bhttp%253A%252F%252Fwww.growweedeasy.com%252Fph&source=iu&pf=m&fir=sDHLSu5UxF5QcM%3A%2C8XipfuBj79JWtM%2C_&usg=__DWzO38qsVOrOoMUEoJPU-TLiaeQ=&ved=0ahUKEwjfkp-JidfOAhXGKJQKHTYpAwIQyjcIKA&ei=wwK8V5-lD8bR0AS20owQ#imgrc=sDHLSu5UxF5QcM:


You need AT LEAST a PH of 6.1 ish

Click to expand...

Looks more like 5.8 to 6.2

I have 4 big fan leaves and they are all deficient BADLY. Should I cut the worse 2 fan leaves off, cut all 4 of the fan leaves (only have 4 big fans total) off, or Leave the fan leaves alone although they are all brown??

bump above question

Meast21 said:

Paper towel method 3 days then in a gro-dan cube that goes into dwc. Tap root takes about 3 days to hit the water, now into day 6 total. Running GH technaflora series with a ppm of about 400-500. Using BC BOOST, BC GROW, SUGAR DADDY, MAGICAL, AND B1-RED set ph to 5.5-6.0.... Like I said from seedling thru the first 2 weeks in veg they are fine. Weeks 3-4 they seem to be acting up or getting what I think is a phospurus defencieny. Once I get them into flower and they recover they are green as could be... Ive had this problem when I have dozens of roots or like in the 3rd week of flower.

Click to expand...

http://www.agtech.com.au/Label/SYNGENTA/Fongarid_label.pdf
if u are going to run dwc use a product that every resert grower or hydro grower uses here

Meast21 said:

I have 4 big fan leaves and they are all deficient BADLY. Should I cut the worse 2 fan leaves off, cut all 4 of the fan leaves (only have 4 big fans total) off, or Leave the fan leaves alone although they are all brown??

Click to expand...

just leave the leaves alone they will drop off next time u run dwc veg in a rockwool cube for 3-4 weeks get a root ball

Might be the tap. I'm having a similar problem running ebb table. I think the tap has stuff in it that makes the ph rise to the given level the water management wants it. Mine would rise a full point every 12hrs until a few days later