how much water?

[Shanti boodica]

hi every1 i was wondering if i could get some advice on watering my plants im using biobizz allmix soil in 18l pots and using canna terra vega flores and boost ive got 2 x 600w hps and 8 barneys blue cheese seeds im currently in week 3 of flowering and using the flores and boost how canna tells me on web site chart 10 liters of water 71ml flores and 40ml boost but when i feed i use 16liters of water so i build the nutes up to the correct ratio of 16l this means each plant out of the 8 gets 2l with nutes every time needed but hardly any water comes out the bottom into the trays when i feed they usuall take this everyother day but sometimes a couple days in a row i no im supose to have a good run off so am i under watering? or over ?my plants look fine im just a worryer and would prefer to do it propa help and coments much apreciated

[Up_in_smoke]

Your doing it wrong! lol
Only playing mate, but I used to do exactly the same and soon saw the problems. 2L is not enough under a 600 for anything over 10L.
DOUBLE IT!
4L per plant, espec in 18s. I have 20L, 15L and currently got 1 in a 10L, even the 10L takes 4L without too much run off.
20L you'll get a tiny drop of run off, 15s a litte more and 10s more still but not loads.

Also funny enough, I am growing Barneys Blue Cheese and use canna nutes.
The canna guide I follow to the letter based on a tank size of 4L, it works out, for the week you're on it'd be 24ml Flores, 8-16ml Boost(closer to 8 at week 3 though), 2ml Rhizontonic, 10ml Cannazym.

All that being said, I've currently got Yellowing and necrotic patches, but its not due to under or over watering, its likely a nute or ph issue which I haven't figured out yet.

When I used to feed 2L per plant per time every 3 days they would start drooping on the 3rd day and start to look sorry for themselves and the always used to yellow VERY early, like where you are now early.
Now that I feed 4L I usually only have to do it every 4 days, and they NEVER droop. Always look perky and healthy

[DustyBowler]

I know this sounds dumb, but I usually just lift my pots. I can get an idea of how much water is needed by how heavy it is. Just a suggestion. I don't lift them off the ground, I just tip them and can tell how moist the soil is. Hope the grow turns out great, I usually get at least 1.5 oz to 2 oz out of 18l (5 gallons) containers.

[Hillbilly]

I know this sounds dumb, but I usually just lift my pots. I can get an idea of how much water is needed by how heavy it is. Just a suggestion. I don't lift them off the ground, I just tip them and can tell how moist the soil is. Hope the grow turns out great, I usually get at least 1.5 oz to 2 oz out of 18l (5 gallons) containers.

Very good way to do it I am a Lazy Arse I wait till I see there drying out one, two, three or so days.. if they look wet I wait till the top has dried.

[DustyBowler]

Sometimes I use hydroton on the top of the soil to diffuse the water, but when I don't, I can get an idea of how moist it is by the top just as Hillbilly suggested. I like to let them go through wet and dry phases too. Like close to wilting, but not too close. Waiting til the top is dry is another great suggestion, hope all is well and btw, you have a really cool sig Hillbilly. You in southern cal?

[Jay500]

If your puting 2 litres throug them pots and getting no run off you need to look at drainage or you could end up with root rot or pests , plants hate having soggy feet.

[Woody J]

My usual routine with soil is this.
Once a plant is in its final pot, with fresh soil, it is just taking on water. So, I water by pouring some into the top of the pot, 10mm or so, let it soak in, repeat and repeat until I have roughly a 10% soil volume runoff. By doing this 2 or 3 times while no nutrients are added, this will tell me how much they are drinking. If it is 3l, then this is how much nutrient I will measure up.

If I am growing 10 plants, I will follow the same principal. Guage how much watering is needed before you start feeding.

If in coco, which require nutes with every watering, its a similar principal in that I mix up enough nutes for around 1/3 of the total coco volume. So, if I have 10 plants in coco in 11l pots, with a little space at the top, I will allow around 3l per plant. Mix this up and water as above. If I have any left, use it the next feeding (I always bubble nutes if they are to be used more than 24 hours after mixing)

By doing this simple routine, I know weeks before I start feeding, how much nutrients to mix up.

Hope this helps. W

[goodbuddy]

Out of date Question.
Been Answered.
Closing off.