Flushing in flowering help

I have 4 girls in flowering stage right now. day 18. bud sites are prominent and growing well. 2 - 1.5gals / 2 - 3 gal FFOF soil grow.

I previously had a calcium issue while in veg. got some bad copper rusting spots that started at 1 plant and made it to all 4. This was week 3 of veg. Did a flush on all 4 and showed no signs of stress from it and it did help clear it out. As after the flush i had aquired Botanicare calmag, pro grow, and pro bloom. Vegged for 1 more week then plant started showing sex by itself. That was the last time i flushed.

Currently 18days into flowering. Using Botanicare Pro Bloom @ 20ml and 5ml of CalMag. Feed every watering. (bottle says to feed every watering, so I tried to see how plants react and they arent showing any nute burn and are loving the food every time) PPMS around 1000 after phd to 6.5. my 2 - 1.5gals are showing cal spotting again and I for sure need to flush them this afternoon. The 2 - 3gals arent really show any signs or need of a flush but i want to give them both 1 last one as well. I think the1.5s are getting salt build up from too much feeding so Im gonna flush.

When flushing in flowering so i just use phd water, or like 1/4 strength mix ? I have about 30-40% perlite so i have great drainage. 96oz in gets about 32oz run off. So I only flush about a gallon or so throught the 3gals and get alot of run off.

what light set up ? how big are the plants ? pictures ?

You may not need to flush, yes there is a chance you have a lock out but there`s also a chance they just need more food or something else is wrong really hard to say even harder without pictures and details......

Sorry forgot those parts.

random bag seed, 400w hps w/ cool tube un vented due to winter and in basement so temps are level at 71 w/ lights on. Plants vary from 24" up to 35" between the 4. the 2 - 1.5gals are about 35" and the 3 gals are about 26" tall.

It is deff calcium issue. Ill go snap some pics fast now.

Quick Pics. Im just going to flush with phd water w/ 5ml of calmag and see how that works. They all need water like right now.



same issue i had back in veg mode. hadnt flushed since that issue either.

Looks like its under fed on secondary`s probably cal/mag could be low potassium or manganese too lets see if anyone else can narrow it down for ya ?

hrm interesting. my chart from botanicare only says 5ml of calmag. i could bump it a bit next feeding.

your running your ppm`s at 1000 ? but is that plus what ever your water normally comes in at ?

I go upto 1000 ppm in veg, early flower 700 to 1000ppm a few weeks in I step up to 1200 to 1600 and then max the plants out at 2000ppm but some strains can take more like 3000 ppm all depends on your set up and the plant

I`ve rarely found more potassium in flower (without going crazy) to ever be a problem most of the time your plants want more than most people can give them anyway as you can`t just go crazying trying to feed them on thing

That plant looks like it could take 1800ppm of balance flowering nutes, but then you may want to give just water or half strength every other watering ?

Cal/Mag and Iron will also help uptake of PK

crawlintbss said:

Quick Pics. Im just going to flush with phd water w/ 5ml of calmag and see how that works. They all need water like right now.

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same issue i had back in veg mode. hadnt flushed since that issue either.

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Try some straight Magnesium, 1 tsp Epson salt/gallon water the affected leaves will not heal but you won't see more added. See if that helps you out.

Im slightly partial to foliar feeding. my only time im around is when the lights are on and i know not to spray with a HPS.

That does remind me, when i had my first issue i did dose with epsom and unsulph molasses.But since i got the CalMag i figured i wouldnt need it anymore.

THE KONASSURE said:

your running your ppm`s at 1000 ? but is that plus what ever your water normally comes in at ?

I go upto 1000 ppm in veg, early flower 700 to 1000ppm a few weeks in I step up to 1200 to 1600 and then max the plants out at 2000ppm but some strains can take more like 3000 ppm all depends on your set up and the plant

I`ve rarely found more potassium in flower (without going crazy) to ever be a problem most of the time your plants want more than most people can give them anyway as you can`t just go crazying trying to feed them on thing

That plant looks like it could take 1800ppm of balance flowering nutes, but then you may want to give just water or half strength every other watering ?

Cal/Mag and Iron will also help uptake of PK

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Thanks konassure!

I used distilled water so has ppm of like 0-5 when i test. Total ppm for bloom nutes after phd is anywhere from 950-1050ppms total. In the process of getting our RO unit hooked up since we have well water, its free for us.

The bottle of botanicare did say to bump to 25ml in weeks 3-6 of bloom. Im still sitting at 20ml because i filled in some info on their site for the nutrient calculator and it gave me to feed 20ml bloom/5ml calmag every watering. interestingly it calls for me to cut back on calmag in weeks 4-6 to 3ml.Im afraif im going to catch more calcium issues. So i tried taht it with no nute burn signs. amazing growth, visually can tell every time i check on them. Unfortunately i dont know the strains of any. 3 looks indica, 1 sativa with it having the very skinny fingers on the leaves.

I ran a flush through 3 of the 4 with phd calmag water to 6.5. Ill let them dry out until sunday and give a dosing with some feeding. Possibly bump it up a bit. 1 of the 3gal was still to wet to give any watering to.

Do you recommend i stay on the feeding everywatering like i have been doing? I see no signs of stress or problems coming from it. ( aside from this calcium issue which seems to be a defficiency ) Should i raise my calmag or add a dose of epsom next time? no signs of mag issues just this calcium spotting which ive read can turn into rust disease issues.

as long as the plants are happy and you let the pots fully dry before you re water that should be fine

I would add some buffers or extra cal mag if you are ro`ing your water as you may get more ph swings but if your having to water them every day and are using ph`d water I can`t see that being a huge issues but it could make it easier to lock something out or even over feed you`ll have to ask someone that`s use your line of nutes before

I think konassure has you on the right track -- but if you want to know for sure just to ease your mind, run some RO through your pot and check the ppms from the first bit of runoff. And based on your reading, add calcium rich nutrient water, or if there's build up, flush with your distilled water until you get an acceptable runoff number and then run a " normal dose" of nutrient water over the top.

Thanks vostok.

i got it all figured out. I have 30-40% perlite already. they start draining after about 64oz ( half gallon ) of water , so i know thats not my prob. ended up my ph pen was reading about .4-.5 higher, which means my phd water of 6.5 area where at like 6.0 or lower. So thats why my soils i came to find where sitting at 5.8 ph. locked out cal and mag. Got it all raised back up now and everything looks okay.