seansplace

[QUOTE=farmergiles;52 079592]I'd use it on all of them.

You were saying the run off EC is low.. this means the plants are taking up a lot of nutrients which could result in the contents of the coco being a bit out of whack.

i not sure what is mean't by being out of whack, would this be a big problem??

farmergiles

The coco acts as a buffer for nutrients. The plant requires a balance of a number of different nutrients in varying amounts at different stages in it's life.

As the plant grows it takes up whatever available nutrients it thinks it needs at the time and leaves the rest. So certain nutrients are almost inevitably depleted before others.

So as you water to waste you are replenishing the needed nutrients and washing out any unneeded nutrients which there may be a surplus of.

-So your plants are beginning to grow fast now. They look well fed but are showing that damage on the leaf which might indicate mag def or might indicate a build up of some salt or more likely both going hand in hand.

-EC coming out is low but they look well fed.

So a flush with fairly mild nutes with some cal mag until the run off EC comes back up a little ought to sort things out IMO.

Does that make sense? There is some stuff about cation exchange in coco which you could look up if you want to know about the science.

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seansplace

yes it gives a better picture of what is going on, i feed them at 0.8 on the 26th when 1.3 was going n and slightly over 1.3 was coming out but since then the run off has been going down instead of coming back up, so its only been just over a week since the last lower nute flash and hasn't risen back up yet. how much would you suggest to feed as its going in at 1.4 and also should i go ahead and start my 12/ 12 as planned or wait until the coco run off rises back up because most of the plants are over 12 inches and one is 17 inches now and im a little worried about space as one ww x bb i seen on here trebled in size. if that happens i will be a bit stuck for head space
as always thanks for the info FG
ps just got this but it only says to rinse if the ec is higher
A 1:1.5 analysis can preferably be done after 3 to 4 weeks. The target values for EC are between 1.1 and 1.3, for
the pH, between 5.5 and 6.2. Very high EC values increase the risk of burning symptoms. To limit the risk of burning
symptoms, the coco can be rinsed with acidified water (pH 5.8: acidify with CANNA pH * growth).

seansplace

just fed them and they don't seem to be getting no worse and will be feeding again in six hours to try and get the ec back up. I did manage to break one leaf on one of the fan leaves so i took it off (not the whole five leaves but just the one leaf).
have decided to get up early in the morning to start the 12/12. i'm not sure if im supposed to be giving them the cal mag every day but my water ppm is very low, lower than the recomened ppm for canna coco so it shouldn't be harmful. they are all over 12 inches now except the one i'm having a few problems with, and the largest is 17 inches.
ps on the 2 that have a bit of yellow blotches, i did remember that i give the pots a bit of a top up last week as they were a bit lower than the rest. i dont know if this would make much difference but who knows.

Roach

always good info

Some growers don't yet realize, you can't force feed plants. You can make available a proper balance for nutrients for a particular greenage, but it's the plant that decides what/when it needs them.

Know your marijuana, and it will tell you what you're doing is good or not so good.

fg knows his herb(s).

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seansplace

hi guys just looked in on them and is there a possibility that they could start flowering before the switch. i couldn't get any tidy pics and will try tomorrow. the one that is doing great looks like it has a pair or it could just be me freaking out as im new to this
pics are as follows. pic 1 +2 suspected male and the other pics is the one that seems to be female

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seansplace

i'll take the last post back, i think i was seeing things lol. but i can defo see little white pistels on the one plant, don't know whether they are the real thing but it has a few on different parts of the plant.

stoneric

Aren't you using fem seeds?

farmergiles

I'd say never ever flush coco with straight water, always use some nutes (at whatever concentration seems expedient) as straight water will strip the ions which are buffering the coco = not good.

The coco needs to be buffered up right- so measuring the EC and pH of run off is the key to knowing what's going on. If the EC is coming off low then you should buffer it up some- but look at the plants. So if they look well fed (like yours do) don't feed them too high an EC or you are asking for trouble.
If you see the leaf degradation like you have seen suspect overfeeding, cal mag lack and/or salt build up in the coco.

With coco you can't really overwater so this means you have the abilty to do what you like with the coco, it (coco) is like hydro in that way.

Just to qualify this statement- I'm talking about coco specifically here and when I say water I mean the mix of water and nutes used.

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seansplace

yes fem seeds but have read that this strain is a bit hermie prone.

seansplace

Thanks FG they don't seem to be getting any worse and i watered twice last night (feed) once at 6 then at 12. ive decided to do the flip to 12/ 12 this morning so won't be looking in on them until later this evening now. i will try to get some pics up in proper light when they go back on and i also have a new camera so perhaps they will be better pics than usual.

seansplace

hi guys just a few pics, after they had their 12 hours of darkness i was quite shocked when i opened the tent as they where all looking very well, all thier leaves where pointing up and fanning right out. i don't know wether this was because of the darkness, the extra feed they had late last night or whether its the but they seemed a lot more happier.

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seansplace

also im still not sure what is going on with this growth in these pics. the first pic with the little white pistel all the plants have except for the largest which has these shown in the 2nd and 3rd pics, i don't really know if they are the white pistels shown in the first pic but there are a few of these looking things on all the other plants.
the other two pics there is none (im not sure if it is just more leaf coming through or not???) but this plant has been the best plant all the way so far with no problems what so ever, hope it is just me worry ing
the second pic is what is going on at the top of the plant and the third pic is what has gone on previous.
FG i did look at the link you gave me about sexing plants and from the pics have a good idea what to look for but don't know if its to early to start looking, hope the best plant isn't going to be a male. had them from attitude and thier all supposed to be female (but who knows)

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farmergiles

Pistils = female expression of genes so all is good so far. Maybe the 4th one is just the last to show, a little variation is not unusual.

They should do fine in a flowering light schedule now that they have started to show sex.

I'd keep on using a little cal mag for the time being- they will almost certainly need it.

They look really good as far as I can see.

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headsrnice

Looks like you're gonna have some stanky bushes

Roach

girls do look happy and healthy.

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seansplace

thanks FG how long should i keep on going using the cal mag, or should i keep going for the rest of the grow.
also still no pistels on the one, not sure if that growth in the pic i showed is little new leaf or flower as none of the others has that extra growth on them.
but on the up that yellowing has stopped getting any worse.

seansplace

lets hope they stay that way lol

farmergiles

You may well need to keep on giving them some cal mag almost right through to the end.
It depends on your water but a lot of people using coco do find adding cal mag a necessity even if they are not using RO water. Your water (0.2 EC I think you said) is pretty exceptionally pure for tapwater IME so I think keeping up a constant low dosage of cal mag is probably a good plan.

Similar with soil and epsom salts for a lot of people. I ought to buy futures in magnesium .

Some people pre-charge their coco by flushing it with cal mag solution before they use it, though I don't know if this is quite so important if you're not using RO water.

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seansplace

yes less than than 0.2 really its closer to 0.1. living in where i am we bath in our drinking water lol, it has seemed to give them a lift since i been using it, haven't been using at full strength, but think i will go on with at least half strength.
i don't get to see them much since they have been switched as i run the lights through the night as it gets pretty cold up the attic during the night.
ps i accidentally broke off two pistels earlier will that make any difference, they where kind of curled and i was trying to get a better look and they came off