Grow Mediums Mother Earth Coco - To buffer / pre-charge or not to?

[Proph]

yeah you're absolutely right about that, except my dumb ass did the following:
1) washed my pre-charged/ph adjusted coco before planting like an idiot
2) didnt properly buffer my coco
3) neglected to use appropriate levels of my base nutrient (Mega Crop. i used too little.) throughout my grow.
4) Kept changing the amount of nutes weekly instead of being patient and giving it time to adjust.
5) used coco intermittently instead of consistently.

basically, after week 4...everything just slowly started turning into a disaster all because i didnt have a steady feed schedule and because the coco was holding on to the magnesium. Right now im having magnesium problems for sure. I'm also having nute burned tips. So im thinking of mixing up a batch of 3.5g/gal Mega Crop with 3.5ml/gal of CALiMAGic and hold it at 6.0-6.1pH.

The 2nd most common advice I give on this site is that deficiencies do not automatically mean to "add more nutrients".. At some point you will have to learn what each nutrient does, and how they all interact with other nutrients. About 85-90% of the deficiencies I see, are caused by a lock out. Either a ph lock out, or a nutrient lock out. You might as well start digging into all of that early on! Just based off of your description I can safely assume that you don't need more calimagic. Too much calcium will lock out magnesium and make it unavailable to the plant. Too much magnesium, and you lock out calcium, making it unavailable to the plant. Too much potassium will lock out both calcium and magnesium. In these situations you would need a ppm pen to check the ppms of the run off.. Then flush until the ppms are back in a normal range. Adding more is rarely the answer. Just keep in mind that you're growing a plant that will be dead in less than 90 days! It really doesnt need much feeding at all.. All of these nutrient products were designed to grow tomatoes and annual flowers and leafy veggies.. Not cannabis.. And definitely not autoflowers.
So just "keep that in mind" as I like to say.

 

[briefbriefs]

The 2nd most common advice I give on this site is that deficiencies do not automatically mean to "add more nutrients".. At some point you will have to learn what each nutrient does, and how they all interact with other nutrients. About 85-90% of the deficiencies I see, are caused by a lock out. Either a ph lock out, or a nutrient lock out. You might as well start digging into all of that early on! Just based off of your description I can safely assume that you don't need more calimagic. Too much calcium will lock out magnesium and make it unavailable to the plant. Too much magnesium, and you lock out calcium, making it unavailable to the plant. Too much potassium will lock out both calcium and magnesium. In these situations you would need a ppm pen to check the ppms of the run off.. Then flush until the ppms are back in a normal range. Adding more is rarely the answer. Just keep in mind that you're growing a plant that will be dead in less than 90 days! It really doesnt need much feeding at all.. All of these nutrient products were designed to grow tomatoes and annual flowers and leafy veggies.. Not cannabis.. And definitely not autoflowers.
So just "keep that in mind" as I like to say.

Hmm! I didnt know about the Potassium locking out Calcium and Magnesium, thats an interesting one.
Okay so... right now my plants are at days 58 and 53 -- they have a lifespan of about 75 days, give or take ten days respectively.
This is their current feed: 4g/gal of Mega Crop and 0.1g/gal of Bud Explosion. The EC is at 1.31 and the PPM is at 947 (500 scale) with a pH that stays between 6.0-6.1 in the autopot reservoir tank. They havent been fed any cal mag for about two weeks because i was told that Mega Crop usually has enough of both for plants. However, im getting burnt tips and some of the older leaves are still getting yellowing between the veins. New growth is a nicer green, but some new leaves are getting burnt tips as well.

The plants are both in late 4th week of flower. Do you recommend i flush this late in the game or just try to get them to the finish line? What would you do in my situation?

 

[Proph]

Hmm! I didnt know about the Potassium locking out Calcium and Magnesium, thats an interesting one.
Okay so... right now my plants are at days 58 and 53 -- they have a lifespan of about 75 days, give or take ten days respectively.
This is their current feed: 4g/gal of Mega Crop and 0.1g/gal of Bud Explosion. The EC is at 1.31 and the PPM is at 947 (500 scale) with a pH that stays between 6.0-6.1 in the autopot reservoir tank. They havent been fed any cal mag for about two weeks because i was told that Mega Crop usually has enough of both for plants. However, im getting burnt tips and some of the older leaves are still getting yellowing between the veins. New growth is a nicer green, but some new leaves are getting burnt tips as well.

The plants are both in late 4th week of flower. Do you recommend i flush this late in the game or just try to get them to the finish line? What would you do in my situation?

When I was using nutrients (I grow organic now) I never let the ppms get over 5-600 with autos. Photo period plants that vegged for two months? Yeah, 900-1000 ppms in mid flower.. But not autos. You start running into nute burn (yellow leaf tipsl), lock outs and other issues when over 600 ppms. Some auto plants can handle heavy feedings.. Most can't. Especially if you are adding 600 ppms of nutrients with every watering. That's why you may have seen recommendations to feed autos at half the recommended dosage. You can do a basic flush and get the ppms to the 5-600 range. It wont hurt. Afterwards you'll need to watch the healthy leaves and make sure the issue isn't still spreading through the plant. Its a lot easier to add what you need nutrient wise, than it is to remove excess.. Just another thing to "keep in mind", lol.