Cannabis & Oxygen at Night, Reducing Trim Smell, Classical Music, Nutrient Mixing & Carbon Filters | Listener Mail #7

It's another Listener Mail episode, and this week the High on Home Grown community has sent in another fantastic selection of questions covering everything from grow room science to keeping your harvest as discreet as possible.

We kick things off by tackling a question inspired by AI-generated growing advice: do cannabis plants breathe oxygen at night, and should you avoid watering before lights out? We separate fact from fiction and discuss how cannabis plants actually behave during their light and dark cycles. We also share practical tips for reducing the smell during trim jail, and explore the long-standing claim that classical music can help plants grow. Is there any science behind it, or is it simply another gardening myth?

The panel also discusses using the dry mode on modern air conditioners to control both temperature and humidity, whether it's a worthwhile option for indoor growers, and takes a closer look at nutrient mixing. We answer a question about CANNA's recommended feeding ratios, EC management, and whether diluting a correctly balanced nutrient solution is the best way to feed your plants.

Finally, we chat about what to do with cannabis roots after harvest, when it's time to replace your carbon filter if you're running high airflow through your tent, and plenty of the usual Listener Mail banter that makes these episodes so much fun.

As always, it's a relaxed conversation full of practical growing advice, cannabis science, community questions, and more than a few laughs along the way.

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