I also agree, we should water depending on the size of the plant, not the pot. The only problem comes with salt accumulation 
, flushing till a good runoff comes handy for this ā¦ 
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Yep, file it under:
Alleviation of salt-related problems is of crucial importance to reduce the impact on crop performance and ensure the profitability of agriculture. This can be done by decreasing the amount of Na+ ions, destroying soil structure and replacing them with Ca+ ions. Adding calcium helps maintain a favorable electrolyte concentration in the soil solution, thereby preserving the physical and chemical properties such as structural stability and clay flocculation, which encourages better root penetration and air and water movement through the soil. Ca2+ ions have a much higher flocculating power than sodium and potassium ions due to their charge and size. Thus, Ca2+ ions have a higher affinity for clays and can easily replace Na+ ions during soil reclamation practices to improve soil properties.
For this purpose of alleviating salt buildups, soils are treated with calcium-based amendments, the most common being the application of gypsum (CaSO4Ā·2H2O). Other products, such as calcium chloride (CaCl2), calcium carbonate (CaCO3) and sulphuric acid (H2SO4), can also be used for reclamation of saline soils but are not as effective as gypsum, and they are destined to specific conditions.
No need to drown roots if soil is salty, just add calcium.
I find 1L water per 1G of soil is perfect. No run off.
I only flush if things have gone sideways and I need a reset.
I used to water to runoff but I donāt bother anymore.
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Agreed. I do it by percentage of volume 1 gallon gets .1-.2 gallons, 2 gets .2-.4, on up. 10-20% by volume depending on plant size and needs.
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Remember the Calcium conspiracy 
, too much Ca may block Boron ā¦ 
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Lol. If you have a Boron problem Iāll eat my damn hat.
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great threadā¦sometimes these easy things get over looked.
does anyone use those moisture meters? i do from time to time just for kicks and really depends on the plant and how old it is but i like 10-20% per size pot.
watering for runoff every time is something i did early on and still works but its technically over watering by definition 
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It depends, I do not have salt accumulation and whenever I water I fertilize, only the last watering before cutting is done with pure water as a ceremony. I only use my own soluble Bio-Fertilizers. Afterwards I reuse a good part of my substrates, since the most they have accumulated is humified organic matter.
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I tend to find in organic soils grows, watering 5-10% by volume works for me. Although I would say closer to the 10%. And obviously dependant on stage of growth for the plant too.
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