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 Watering to 10-20% runoff - what's the logic?

Discussion in 'Nutrients & Additives' started by Exivious, Jul 27, 2018.

  1. Exivious

    Exivious Welcome to the CannaZone

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    I'm wondering what the rationale for watering to 10-20% runoff is. I've heard different reasons given, but the most common tend to be the same rationale behind flushing (e.g. salt build-up). I'm using straight coco and am inclined to believe watering past the point of initial runoff is unnecessary, though I've been doing it. I haven't even completed a single grow yet, though. Please change my mind.
     
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  2. Rollin_along

    Rollin_along Walter Greenthumbs

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    My run off is incidental to watering my girls. I've never had a problem. I do grow in soil however.
    Sent from my comfy chair.
     
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  3. BII

    BII Smoke Cannabis Live with Friends on AFN

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    I now only sometimes drain-to-waste with coco/perlite, make sure to do it say every 3-4 weeks at least. Most prior grows I never bothered to do it; and never saw any related problems. But I was using ~5 gallon pots, and I presume salt buildup is at lower concentration in larger volume pots; with it easier to avoid problems from not draining-to-waste in larger pots.
     
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  4. Exivious

    Exivious Welcome to the CannaZone

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    These are 5 gallon fabric pots. Sounds like I don't have to worry too much about meticulously draining to waste every time.
     
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  5. chefdave

    chefdave Burns are my life

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    Good evening 10. 15 or 20 percent is good this allows salt build up to be flushed. I grow in 50/50 in smaller grow bags and water everyday 2x a day in flower. Strait coco is fine holds moisture longer, but also can have lockout issues if not 10-20% runoff Especially in larger grow bags /pots. The reason for me doing 50/50 coco/perlite is also more air-more explosive root growth which is key in early development of plant. Also at this ratio it is impossible to overwater. It requires more watering and nutrients but after 10 years of growing, found it to work best. Give it a shot next grow. you only need 2 gallon grow bags with this 50/50 mix for autos, 3-5 gallon for photos. Also this ratio is good if your going to use some technique( drip emmiters, etc.) of automatic watering/feeding.
     
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  6. AutoWonders

    AutoWonders Cannabidiol Heaven

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    I'm with chefdave on this one.
     
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