lower fans leaves turning yellow need help

[andyob99]

Hi this is my first grow and im 3 weeks in to flowering and lower fan leaves turning yellow and the higher fan leaves are getting blotches on them. Im growing white widow in a mix of soil,perlite and miracle grow seedling compost the ph is 6.8 temp 70-80f i use tap water for watering that i leave a few days in a bucket before using(i dnt know the ph of the water) the light is a 150 watt hps

andyob99 Reviewed by andyob99 on 05-01-2012. lower fans leaves turning yellow need help Hi this is my first grow and im 3 weeks in to flowering and lower fan leaves turning yellow and the higher fan leaves are getting blotches on them. Im growing white widow in a mix of soil,perlite and miracle grow seedling compost the ph is 6.8 temp 70-80f i use tap water for watering that i leave a few days in a bucket before using(i dnt know the ph of the water) the light is a 150 watt hps Rating: 5

[M3thnitup]

I wouldn't use miracle grow because it kills weeds and weed is a weed.

[pushit]

I wouldn't use miracle grow because it kills weeds and weed is a weed.

I used MG alot when i first started and it never killed one plant. Dont know where you get your info from but id start getting it from a more reliable source.

As for yellowing leaves at the bottom, its pretty normal especially during flower. If you are getting spotting on higher leaves it could be due to ph issues. Im just guessing here so if you want a more accurate answer the best thing you could do is fill out a trouble shooting form and fill out the best you can.

[mattj12pint2]

start checking ur ph lvls, its a must...if the ph is to high or even to low u will cause nutrient lock out. ur showing nute deficiencies, but dont just go and add nutes. mix ur water and ur nutes and then adjust ur ph, even though ur in flowering stage ur plants are lacking nitrogen, add some extra nitrogen, but keep ur phosphorus a lil higher...i went and searched ur problem in my cannabis grow bible so this info is pretty much dead on

[andyob99]

thanks for the advice guys . mattj12pint you said check my ph levels my soil ph is 6.8 is this ok and about the nutes im using boi bizz

[pushit]

thanks for the advice guys . mattj12pint you said check my ph levels my soil ph is 6.8 is this ok and about the nutes im using boi bizz

I believe he's talking about your ingoing water ph. As long as your ingoing water ph is around 6.5ish youll be fine. If you are adding nutes to your water, make sure you check the ph after its added. Like he said, nutes will usually drop the ph

[mattj12pint2]

i personaly dont do soil grow but in the book it says u want to keep ur soil at a 7 ph lvl, so ur pretty close, i dont see ur ph being the prob if its that close, give her a lil more nitrogen and keep an eye on ur new growth for signs of any deficiencys, all strains are a lil differ and may ask u for a lil more of differ nutes at times. u should also think about getting a cannabis grow bible. i got mine at barnes and noble for 28 bucks but u have to ask for it, they keep them behind the counter lol

[mattj12pint2]

yes i was talking about the ingoing water, but he also has to keep an eye on his soil, cause the breakdown of the nutes can cause his ph lvls to rise so he may have to drop the ph in his water to make up for the rise in his soil, but if he keeps about a neutral 7 ph he should do good

[mattj12pint2]

and what ever u do dont over water, wait till its time to water again, ur plant is stressed a lil and ide hate to see it die at this stage....be patient, she will come back lol

[mattj12pint2]

lol, i wonder if he has ever tried mg? the only reason ive ever heard not to use it, is because of its slow release of nutes and if a beginner u may not know the right time when to add the right amounts of nutes and cause nute burns