Marijuana plant problems

[JEREMIAH NAIK]

Hi guys, for the past few weeks I have been having issues with nutrition lock I've been giving cal mag... I see some of the yellow leave are getting brown sports on them as shown on the pics below please have a look off those pics an tell me if there something that I am doing wrong in my grow will really appreciate it guys

 

[hotrodharley]

Phosphorus deficiency

 

[LEDsnake]

Huge Magnesium deficiency, little phosphorus deficiency

 

[Hobbes]

What's your Ph?

 

[WhattTimeisit]

Hi guys, for the past few weeks I have been having issues with nutrition lock I've been giving cal mag... I see some of the yellow leave are getting brown sports on them as shown on the pics below please have a look off those pics an tell me if there something that I am doing wrong in my grow will really appreciate it guys

HI i had the same problem once before almost like yours, so here what i did to fix it, their are some things you first have to ask yourself, your girls are in flowering stage,(1) did you flush your plant recently, because if you did flush your girls, than your girls are feed only off themselve,if you did flush them? you need to start working nutes back in them. (2) you already know what nutrition your feeding girls, so is you overfeeding or underfeeding? anyway you need to start checking Ph and ppm plus making sure you having runoff draining from the bottom of you pots, during watering or feeding your pots need to have some runoff, this way you can check your ppm to know if you are overfeeding or underfeeding your girls. (3) last but least mean you got lockout, which means you have to flush your girls, i hope this help. but maybe some of the guys on here can share a little more help too

 

[JEREMIAH NAIK]

What's your Ph?

My ph for feeding is in between 6.05 an 6.10

 

[JEREMIAH NAIK]

I

HI i had the same problem once before almost like yours, so here what i did to fix it, their are some things you first have to ask yourself, your girls are in flowering stage,(1) did you flush your plant recently, because if you did flush your girls, than your girls are feed only off themselve,if you did flush them? you need to start working nutes back in them. (2) you already know what nutrition your feeding girls, so is you overfeeding or underfeeding? anyway you need to start checking Ph and ppm plus making sure you having runoff draining from the bottom of you pots, during watering or feeding your pots need to have some runoff, this way you can check your ppm to know if you are overfeeding or underfeeding your girls. (3) last but least mean you got lockout, which means you have to flush your girls, i hope this help. but maybe some of the guys on here can share a little more help too

I haven't tested the runoff as yet, which I should have done earlier ... will do that thanks a lot much appreciated

 

[JEREMIAH NAIK]

HI i had the same problem once before almost like yours, so here what i did to fix it, their are some things you first have to ask yourself, your girls are in flowering stage,(1) did you flush your plant recently, because if you did flush your girls, than your girls are feed only off themselve,if you did flush them? you need to start working nutes back in them. (2) you already know what nutrition your feeding girls, so is you overfeeding or underfeeding? anyway you need to start checking Ph and ppm plus making sure you having runoff draining from the bottom of you pots, during watering or feeding your pots need to have some runoff, this way you can check your ppm to know if you are overfeeding or underfeeding your girls. (3) last but least mean you got lockout, which means you have to flush your girls, i hope this help. but maybe some of the guys on here can share a little more help too

I haven't done a flush, my girls had a nutrient lock an then I had to give them some Cal Meg supplement

 

[Southernontariogrower]

My plants did that bc of low ph, not sure why yours are. I didnt store or calibrate my pen properly and toasted it. Do you calibrate often?

 

[xtsho]

Why would you give just calmag? You only need calmag if you have a calcium or magnesium deficiency. Too much calcium can lockout other nutrients. Reaching for the bottle of calmag whenever there is an issue can actually make things worse.

If you're growing in soil using tap water you more than likely will never need to add any additional calmag. Calmag is not some wonder additive. It's overuse can lead to nutrient issues.

Regardless, that plant is too far along to even worry about trying to correct anything. Don't waste your time chasing runoff and all that other stuff. Just give it plain water, harvest when ready, and call it a day.

 

[Southernontariogrower]

Why would you give just calmag? You only need calmag if you have a calcium or magnesium deficiency. Too much calcium can lockout other nutrients. Reaching for the bottle of calmag whenever there is an issue can actually make things worse.

If you're growing in soil using tap water you more than likely will never need to add any additional calmag. Calmag is not some wonder additive. It's overuse can lead to nutrient issues.

Regardless, that plant is too far along to even worry about trying to correct anything. Don't waste your time chasing runoff and all that other stuff. Just give it plain water, harvest when ready, and call it a day.

Calmags not the miracle nute, lol! You are so right on what can happen with too much use. Im guilty as charged but trying to learn. Only giving once this flower cycle, around day 35, just so l know theres enough in the medium. Used in veg. Every feed. I dont worry about what leaves look like later in flower, dont smoke them. As long as the bud is healthy and growing your good. Beautiful plants btw.

 

[JEREMIAH NAIK]

My plants did that bc of low ph, not sure why yours are. I didnt store or calibrate my pen properly and toasted it. Do you calibrate often?

No I only calibrate twice so far,...
will do

 

[JEREMIAH NAIK]

Why would you give just calmag? You only need calmag if you have a calcium or magnesium deficiency. Too much calcium can lockout other nutrients. Reaching for the bottle of calmag whenever there is an issue can actually make things worse.

If you're growing in soil using tap water you more than likely will never need to add any additional calmag. Calmag is not some wonder additive. It's overuse can lead to nutrient issues.

Regardless, that plant is too far along to even worry about trying to correct anything. Don't waste your time chasing runoff and all that other stuff. Just give it plain water, harvest when ready, and call it a day.

Can I had molasses to the water?

 

[xtsho]

Can I had molasses to the water?

You can but you'll just be wasting molasses.

 

[LEDsnake]

Adding extra unnecessary stuff like molasses is not going to help. Calcium is required in micro doses and can definitely lock out other nutrients. Espom salt is more forgiving.

 

[WhattTimeisit]

I haven't done a flush, my girls had a nutrient lock an then I had to give them some Cal Meg supplement
[/QUOT if you girls have a nutrient lock? what i would do is use plain ph water and flush a little bit check your ph before watering your soil and also check your runoff with your ph meter to see what the ph is level come out your soil, to see if their a difference in ph soil level, and also check your ppm to know how much nutrition in your soil, you see you are in the flowering stage, i do know how far you from harvest , but if you go online there are charts on what ppm you should be at in your flowering stage, but i wouldn't add any nutrient until i check my ppm and ph level first,that way you will know if your girls need nutrient, but if near harvest i would just use water , i hope this help

 

[Susanne]

What about Epsom salts for the Magnesium deficiency? I have Leaf Septoria, and have been trying to get rid of it for years. This year was the worst, and only last week did I re-evaluate it and some of the newer plants did have the dark/light veins, where lately the others either were almost totally yellow (too far in bloom to be nitrogen) with brown-tipped leaves, or yellow with spots. I have younger plants that did show the veins and that’s when I realized so much was Magnesium.

So, I treated it with Epsom salts, and I came back online today to find when to apply it again, and can’t seem to find it. Anyone know?

sorry to hijack your thread. I’m needy .

 

[Southernontariogrower]

What about Epsom salts for the Magnesium deficiency? I have Leaf Septoria, and have been trying to get rid of it for years. This year was the worst, and only last week did I re-evaluate it and some of the newer plants did have the dark/light veins, where lately the others either were almost totally yellow (too far in bloom to be nitrogen) with brown-tipped leaves, or yellow with spots. I have younger plants that did show the veins and that’s when I realized so much was Magnesium.

So, I treated it with Epsom salts, and I came back online today to find when to apply it again, and can’t seem to find it. Anyone know?

sorry to hijack your thread. I’m needy .

During veg l give epsom salts more often than later. If microdosing have given pinch every watering at times. Cant really say but once a week sounds ok to me, @xtsho knows everthing, no shit! Only time l had bad yellowing and necro spots was bc ph was very, very low. I really f ed up!