30 - 40 cm plants in 15 litre pots how much water ?

dazzyballz said:

Sorry- In hydro company i meant any that sells all grow equipment, not just hydro.theres flush for soil been on sale for years.in the canna"bible" it says to use 3 times the vol.of the pot for water to flush your plants.

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They would sell you anything. The cannabis market is like the baby market, so many unnecessary products

True

Here's the write up from Mandela seeds in regards to soil grows and flushing:

Can I flush on soil?

You should avoid watering more than normal and having a lot of run-off in soil grows. Heavy watering or flushing/rinsing the soil can cause bud mold (run-off also washes out nutrients). Instead, give the plants their daily requirements and water at the start of the light cycle. Even if they let the leaves hang a bit now and then in the final 10+ days it's better than over-watering at this stage. In principle you should never have to flush in soil cultivation. It leads to all sorts of complications like waterlogged soil, nutrient run-off, fungus, etc. If you already know you have made a mistake like over-watering, always wait for plant health to improve before taking steps further with feeding, etc. You can't "cure" anything with feeding unless there is a real nutrient deficiency at hand. You won't get a nutrient deficiency in soil if plants are in quality soil, have an adequate container size, and the pH of your water is OK. If the pH of your water is not within range you need to correct it... feeding would only stress the plants even more because they can't take up the nutrients in a substrate watered with a wrong pH. Flushing your soil prior to harvest does NOT improve aroma and taste of the buds. It DOES increase chances of getting bud mold within 48 hours and can easily lead to other fungal infections which threaten your crop. The smart way to increase aroma is to buy quality soil and mix it with beneficial aroma enhancers such as worm manure and compost. Rinsing substrates should only be applied to hydroponic cultivations. The idea is to water with a very low EC, special ripening products, or only pure water a few days or a week prior to harvest - again, there should be no need to flush large amounts of water through the system. In coco coir this can also lead to a soggy substrate and increase the risk of bud mold. - See more at: http://mandalaseeds.com/FAQ#IN14

I get were your coming from.i say i only flush once before harvest,but i do flush..i do give them clean water for two weeks low e.c so that seems to be enough nowadays.i think its maybe been a bit of overkill in the books ive read im unsure.cheers for the info.peace

woo started quite the debate here lol i was told its all about doing a little flush with water in final week let the plant eat what it can then do a 2-3 day dark cycle no light at all then cut about an hour before the lights would usually go on

budulyk said:

woo started quite the debate here lol i was told its all about doing a little flush with water in final week let the plant eat what it can then do a 2-3 day dark cycle no light at all then cut about an hour before the lights would usually go on

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To flush or not to flush that is the question..ive went through all my grow books yesterday and they all tell you to do a flush with a load of run off.think ill just dial it down a little on the amount of water,thing is ive never had bud rot/mould.flushing has always worked for me. theres so much iffy info. You dont know what to believe.

dazzyballz said:

To flush or not to flush that is the question..ive went through all my grow books yesterday and they all tell you to do a flush with a load of run off.think ill just dial it down a little on the amount of water,thing is ive never had bud rot/mould.flushing has always worked for me. theres so much iffy info. You dont know what to believe.

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correct...so you can only believe yourself, so I suggest you flush half of your plants, and the other half you don't....and you be the judge