Sick Plant Help please I really want to save them

Hi & welcome to Percys
Leaves turn yellow for a few reasons, Ph lockout, lack of Nitrogen, lack of light being the main ones...are you overwatering ?? cannabis likes a wet to almost dry soil, how often are you watering, what are you growing in & what are you feeding them ?

sounds like over watering to me.... what pots are you using etc. explain your set up more and people can say how to improve conditions

@catbrat could you post a couple pics of the plants. and give us more info about your grow. So we can help provide you with the proper answer.

 Yeah a pic would help it could be a few things from not enough food to too much food,overwatering,phect ect 

Post a pic & am sure one or two of the folks here will put you back on track 

@catbrat welcome to Percy’s mate. Looks like the soil growers are getting all the information to help your grow along. The more information you provide the better the answer will be.

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  we use miracle grow and give them about 2-3 litres of water depending on the of the dampnesses soil. Most of the time it’s everyday but if it’s damp Ill wait extra one  

• There pretty large pots I don’t know what kind they are but both of us are thinking light nitrogen, thanks.

First off, you have done a great job on this so far! Miracle grow is really bad for growing cannabis, plants don't usually look this happy this far through thier lives if they are fed that! 

It looks more over fed than anything else, which is causing lock out of other nutrients. Pot looks a little small too. 

I would be tempted to transplant it into a new pot of soil.... it is usually not advised this late into flowering but i think it would make the plant much happier. 

Get some nice soil, just a standard bag from a garden centre, fill a 20L pot with it. 

Use a pot the same size as the pot your plant is growing in now to make a hole in the soil. That will make sure the hole is the perfect size for the root ball of the plant. 

Remove the pot from the plants root ball and plant it into the hole. then add soil over the top to make sure the root zone is fully conver in new soil. 

The water them.... with just water, no more miracle grow

This would give the plant fresh nutrients from the soil, and it should be enough to finish the grow. It will also give the roots a bit more room. The roots won't grow much at this stage but the will be less restricted which will help with water intake and food too. 

I think doing this would have them looking better in a week or so..... hope this helps. But again, good job so far! 

Miracle grow.... OH NO.... NO NO NO.... and do what macky says...  and check out ecothrive or bio bizz for your next grow  

Obviously mackys got you covered.

just a side note for future plants use little nitrogen in flower to much will lead to the plants yellowing and burning and sparse flowers. Good luck