Every time you water your plants, you are doing 2 things. First, you are providing water for it to grow. Second, you are flushing the the waste products of the plant’s natural processes out of the soil so they don’t build up and cause toxicity. The salts that are produced by extra nutrient uptake can quickly make soil uninhabitable for roots, so you have to wash these out.
10% – 20% extra runoff every time you water. You don’t want to water just until the soil is moist, you want to water until extra comes out the bottom of the container, taking those salts with them.
This will also notify you if there are drainage problems. If your container tries to overflow the top instead of running out the bottom, or takes a very long time before any comes out the bottom, you have a drainage problem.
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I never Water with Run off because i thought it is not good when you Grow Organic? Biobizz told the same do you using Biobizz?