K or MG def?

Discussion in 'Sick Plants and Problems' started by chr0nicxs, Apr 8, 2010.

  1. [​IMG]

    What STRAIN are you growing? Great White Shark
    What was the establishing technique? Seed
    What is the age of your plants? 6 weeks into 12/12
    What PHASE are the plants in? Flower
    What Technique are you using? Hand water
    What substrate/medium are you using? Canna coco
    What is the Nutrient temperature? Room temp
    What Nutrient's are you using? Hesi Coco
    What is the TDS/EC/PPM you are using? Irrelevant when using Hesi (Contains urea)
    What is the pH of the "Tank"? 5.8
    Are you sure your calibration is correct on your equiptment? yes
    When was your last watering? Daily
    When was your last feeding change? 5 weeks ago
    What size bulb are you using? 400w hps
    What is the distance to the canopy? About 13-14"
    What is your RH Factor? 40-50%
    What is the canopy temperature? 75-79f
    What is the Day/Night Temp? (Include flucutaion range) 69-70f
    What is the current Air Flow? (cfm etc.) Grow tent, 5" Ruck
    Is the fan blowing directly at plants? no
    Is your water HARD or SOFT? Moderatly Hard
    Has plant been recently pruned, cloned off of or pinched No
    Have any pest chemicals been used? If so, What and When?
    Are plant's infected with pest's Yes, Springtails & Thrips (Thrips have been knocked back to v.small population)


    Hesi bottle instructions is to use 5ML/LITRE I fount this gave nute burn so I was giving 3.5ml/litre untill week 5 when I gave 1.5ml/litre Hesi and 1.5ml/litre PK 13/14. By the end of the 7 day PK cycle It looks like I have A Potassium deficeny or is it MG? I dont know wether to add more Feed or not.

    Hesi NPK is 8-6-10.

    Cheers.
     
  2. looks like either heat stress? or nute burn or phoshoruous def, i would start by raising the light then flushing then when it dries give plain water then when that dries give weak nute solution
     
  3. Thanks for the response, I dont think its Heat stress but ill back the lamp off to 15". At first I thought maybe phoshoruous def but its just had 7 days full strengh Canna PK 13/14 along with 1.5/ml litre hesi nutrients, I flushed that particular plant 2 days ago and it seems to have worsened. Could it be underfed?
     

Share This Page