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Everything you Need to Know About Flushing and Watering your Cannabis Plants

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All New Homegrown PotCast
December 23, 2020
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This week’s PotCast episode is all about flushing your cannabis plant and also about watering them too. Flushing and watering are two sides of the same coin, while one purges (or flushes) nutrients from the soil, the other nourishes the soil with nutrients.

Flushing

There are many novice growers and veteran cultivators that come to me and ask if they should flush, if flushing does anything, or if flushing is a myth. Most of the time it’s not as easy as just saying, don’t flush it does nothing as science proves, since we can’t pull anything out of an already developed bud structure.

Now if I just went off of that information sure, flushing is useless, however, there are many benefits to flushing that many cultivators or, those arguing flushing is useless, fail to see. So let’s go over a few of those benefits now and what flushing is.

Flushing is the act of purging your soil with three times the amount of PH adjusted water, normally 5.6 to 6.0 PH range with a flushing agent to help pull more excess byproducts out, than the grow medium or soil is doing. So if you had a 5 gallon grow pot you would want to flush 15 gallons of ph adjusted water at 5.6 to 6.0 ph through your grow medium. In hydroponics or soilless it’s a matter of changing your reservoirs twice to 3 times daily for the last week of life to allow the plant to rid itself of any excess nutrients. 

But, how useful is flushing, how will flushing help my cannabis plants? You will have to listen to the PotCast to find out!

How Often Should you Water Cannabis Plants?

This question is probably the number one question I receive from my novice growers, some veteran growers as well. Now different grow mediums have different requirements so I’ll be discussing living soil and soil mediums first, then I’ll go over hydroponic, aeroponic, and soilless mediums.

For those who are growing in soil-based mediums, you’ll be watering your plants based on their stage of growth. For seedlings, I keep the soil moist but not soaking wet. This is maintained by watering twice to 3 times daily depending on the heat or humidity of your tent. For vegging plants in 1 to 3-gallon pots I recommend feeding your plants once every 3 to 5 days with 1-gallon feedings. This way you can allow your soil to dry out in between feedings. For mature plants in 5-gallon pots or larger I recommend feeding 1 to 2 gallons every 3 to 5 days. This allows for the grow medium to dry out, whilst allowing the microbial life to maintain food sources. 

Overwatering your plants can cause serious root issues and nutrient problems. It’s best to go with this general principle for feeding to watering ratio. I feed one compost feeding every 10 to 14 days with 1 to 2 water feeding in between those 10 to 14 days. This helps not overload my soil causing nutrient toxicity, as well as this, puts vital nutrients and sugars back into the soil for the microbial life to consume and break down.  This can also lead to issues like root rot.

Make sure you listen to this week’s PotCast to gain valuable information on this topic. For more growing information in real-time why not join in on the conversation over at the Homegrown Forum.

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