When to cut off Cal/mag???

This is something I would like some input on as well. I am still using it 2 weeks into flowering.

 

I would just stop when you stop feeding all together to begin your flush. Typically around week 6 in an 8 week strain.

 

Same here halfa, I assumed he was talking about soil at any rate. From what I have been reading today, some drop mid cal-mag mid way through flower. I really think it is going to be strain dependant.

 

Maybe I shoulda clarified a little. I kinda gave a short answer. Week 6 is when I cut off calmag and the micro blend of my nutes. Week 6 and 7 I only give bloom nutes and week 8 is a flush.

 

Really? So you are using the micro all the way up to week 6, interesting.

 

Im using a modified lucas form for coco that was put together by some breeder on icmag forums. He cuts out the micro in week 6 and uses just bloom for a week then pure water for the last week. Everything so far has gone well minus a minor cal def early in flowering.

 

So you are following REZDOG or H3ad... I started there, but tailored it to include cal/mag, humic acid and the occaisional florakleen. I tried the epsom salts for the first few weeks of veg, but their were some deficiencies showing, and I felt the epsom salts weren't doing their job.

Currently in flower I am using 6ml micro, 11ml bloom, 5ml cal-mag
In veg I used 6ml micro, 10ml bloom, 5ml cal-mag

REZ and H3ad both did not incorporate cal-mag... did you adjust your formula at all to account for the added nitrogen in cal-mag?

 

Ive been using cal mag too, but been using much lower ppms since I put a few amendments in the coco like marine cuisine and guano.

 

ive been using cal mag up unitl the last week of flower with my coco.last week i just use plain water and sugar

 

You will see this often, everyone does different things, what works for one may not work for others. Too many variables to take into account such as environment, regional climate, grow area, etc.

 

yea theres pretty much no correct answer.sometimes you have to use your own eyes instead of stupid forums sometimes lol.the uptake of calmag for each strain is different also.like said above way to many variables for a correct answer.

if i notice purpling of the leaf stems i up the cal mag up..its that simple.with coco you really cant OD on calmag bc they eat it up crazy.

 

Good Question. No one has brought up the fact of RO water. That's why I use Calmag mostly.

 

I use 2 part(house & Garden Coco A&B), rather than 3 part, so this might be different. Or, I could just be wrong.

It was my under standing that, mid-flower(week 5ish for my 8-9ers), you drop from a 70% primary nutes/30% additives and hormones, to 50%/50%.

What your guys opinion? It directs me to do this on a feed chart I found. The chart works great, but isn't completely correct as it is.

 

I've been cutting my c/m in half at about a third the way throu flower, then remove completely at the 2/3rd's point. For the last third I add a little Organicare mag. I'm trying to keep the extra N out.....

 

just to let you know sulfur def has purple leaf stems too .and too much cal blocks the intake of sulfur which mimics nitro and mag def. so when you see purple leaf stems don't assume you need to up cal mag I almost killed 4 girls until I figured it out.

 

Next grow I'm going to create my own mixture of cal/mag using calcium nitrate and magnesium sulphate (epsom salt), which is not too high on the nitrogen and provides a sulphur boost. I believe the plant requires less calcium, more magnesium at preflower stages and less magnesium, more calcium during flowering(please correct me if I'm wrong). This can be adjusted accordingly with seperate mag and cal suppliments.

This still may need some iron in there, but there is a reasonable amount of chelated iron in my base nutrients.