It’s important to to control humidity in any growing environment as it impacts the quality of crops, the growth of crops, and diseases in the farm. (Read the article here: https://university.upstartfarmers.com...)

Different crops prefer different humidities, but optimal humidity usually runs from 60-85% for different crops. (But be sure to look it up for your crops specifically!)

Too little humidity, and plants don’t get the inputs that they need for growth and metabolism. In this case, you might need to humidity your space.

This is rare for most growers, although here in arid Wyoming, we do have a humidifier in our farm. We use a fairly large industrial indoor humidifier for every 500 square feet. Sizing a humidifier can be tricky, since it depends on crop type, transpiration, heat, evaporation, and more factors. There are some calculators related to this in Able.ag.

Usually, growers won’t have to bother with humidifying a growing space, because plants function as little humidifiers themselves. Plants release water vapor through transpiration, a key part of their metabolism. This means that TOO MUCH humidity is a much more frequent problem.

Too much humidity can cause disease and fungal pathogens. In this case, you need to know how to dehumidify. There are several options here:

1. If you’re in an arid climate, then air exchange might to the trick to control humidity.
2. Air conditioning dehumidifies by condensation.
3. Dehumidifiers are available for both commercial and hobby applications.

Often, growers need to cool a greenhouse as well. In this case, choose a method that makes dehumidification easier. For growers trying to cool their greenhouse using a cooling wall are adding humidity to the air. They aren’t very effective in humid areas.

Sizing a DEhumidifier is also tricky. We recommend getting in touch with us to figure this out.

Remember that humidity is tied to temperature. As temperature goes up, its ability to hold water increases also, and that usually means that warmer air is more humid. Sometimes, growers can manage humidity be lowering the temperature of their growing environment.

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Timestamps / What’s Covered:

00:17 - Effects of Poor Humidity Management
00:45 - Optimal Humidity Levels
01:20 - How to Dehumidify
01:43 - Cooling Walls & Swamp Coolers
02:16 - Dehumidifiers
03:41 - Sizing a Dehumidifier
04:09 - Why You Don't Need to Humidify
05:03 - Environmental Controls & How They Relate



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Music by:
Scott Gratton
http://freemusicarchive.org/music/Sco...