Cannabis Troubleshooting

OK, I am using an EBB and Flow system, the nutrients are changed and the plants are washed every two weeks, the nutrients being used are GH (Grow, Bloom, Micro), the plants look great in Veg but once they are 2 – 3 weeks in Flower they begin to turn yellow (the tops first) with the veins staying green. The tips are pointed down with a little burn at the tip and once the leaf begins to die the tips turn up. The nutrient strength is as the manufacturer recommends (1200 – 1400 PPM / American System) the temp in the room is 70 or so and the water temp is the same. They feed for 15 min. every 4 hours only in the light period. I think it is an Iron or Magnesium deficiency…

Hi there......... i got 5 plants growing outdoors, that are halfway through flowering....... up unto 2 weeks ago all the leaves were a nice lush green colour as they should be, but the last week ive noticed the leaves near the bottom of the plant and a little in the middle of the plant are starting to turn a plale green / yellow colour ? what is the cause of this......i gave them some organic fertilzer about 3 weeks ago, maybe its time for some more Fertilizer ? ? ? What do you think ? P.S only about 10% of the leaves are starting to turn this pale colur. the rest are still lush green.......... Ive attached a pic of a leaf that i took from my webcam.........…

Ok, So I don't have Spidermite, I'm pretty sure they're scarid-fly, but I have these tiny little white things crawling over the top of my plants in potting-mix. The plants themselves look perfectly healthy and are growing strong, but I'm concerned as to what these little things are. They are "jumping" across the surface of the medium - I assumed from this behaviour plus the fact I dug in the mix and found a tiny little flying insect that they are scarid fly. Fortunately, the plants are watered with Dutchmaster Guardian - I believe this will help? I just gave them a good spray-down with a pythreum/garlic spray I bought at the nursery, will this do anything? I do …

Hi there....... can some one suggest a natural home made remedy for getting rid of bugs and pests........ Ive noticed some of my leaves have a had quite large bites taken out of them but when i search under the leaves theres no bugs to be seen........ i heard a while ago that you can make some natural spray that will get rid of pests......... i think it had chillie and garlic in it or something....... does anyone know the exact ratio to make such a spray thanks jason i want to make my own..........i dont want to buy anything from the shop

A problem has started that I haven't seen before. It looks like rust. It begins in the main veins of relatively new growth, killing the leaf from the inside out. Older leaves are not affected as much as the newer ones. It is especially apparent in the tender newest leaves trying to grow from the tops. It halts the growth of the plant, as it struggles to survive against this problem. What could it be? It's affecting nearly all my indicas, but not my sativas, even though they are planted together.

2 days ago I watered these the soil wasnt quite dry yet, I allso increased the ppm from 1000 to 1500, useing bc nutes, ph 6.8. soaking from bottom till top gets wet. allso added the 400hps-hort. to the 400 mh, useing hand method to tell heat,RH-53-55, on 14-10 light

Sorry they are so big I forgot to do something.

i have just had one of my white rhino seeds sprout but the frist to sets of leafs are tiny and the round leafs have all curled up i am growing them in a mix of coco and perlite what should i do any ideas :scratchin

I recently purchased a Eutech ph scan...can't seem to get it to calibrate. How do I know if its a dud or not.

Hi there...... Last October, i got some ducksfoot seeds............ I kept 4 seeds and gave 4 seeds to my friend............. His plants are doing well and are well over 6 ft but mine are very small, lucky if they are 3 ft............. I think it might have something to do with the soil ? This year for the 1st time i used different soil.................but its still a general potting mix soil.....i got the PH tested yesterday and its 7 which is neutral so im unsure what the problem could be any suggestions ? thanks JAS