Ever watched one of those viral gardening videos and thought, “Huh, that’s interesting… but also a little confusing?” We did too after seeing a popular video online of someone propagating basil in water. It worked like a charm, developing beautiful roots, but then came the head-scratcher: why, oh why, do we then take those water-loving roots and plant them in soil that’s designed to drain water away? Why do plants not like their roots sitting in water? If you’ve ever wondered about this little gardening paradox, you’re not alone! We’re diving deep into that very question in today’s episode.
Why Do Propagated Plants Crave Soil?
It all comes down to oxygen! While water propagation gets those initial roots going, those roots still need oxygen to thrive. When they sit in stagnant, submerged water for too long, they’re essentially suffocating. Think about it: water can hold some dissolved oxygen, but it’s nowhere near the amount roots can access in a well-aerated soil environment. Over time, standing water can also become a breeding ground for all sorts of nasty anaerobic bacteria and fungi. These unwelcome guests inhibit what little oxygen transfer there is, and can lead to root rot – goodbye, beautiful basil
It’s the same principle when you think about cut flowers in a vase. If you don’t change that water regularly, it gets cloudy and funky. That’s because the flowers are absorbing oxygen, and any lingering particles or bacteria are rapidly depleting what’s left. Fresh water is key to providing those stems with the oxygen they need to stay vibrant longer.
So, while water is awesome for kicking off root growth, it’s not a long-term solution because it simply can’t provide the consistent oxygen supply that healthy roots demand. When you transplant your basil (or any other plant) into good draining soil, you’re giving those roots exactly what they need: a stable environment where water can flow through, bringing dissolved oxygen and leaving air pockets behind. This is especially important for plants that are providing flavour, like herbs.
And let’s not forget about the buffet of goodies that soil brings to the table! Beyond just oxygen, planting in soil introduces your basil to a whole world of essential nutrients. We’re talking about vital elements that aren’t available in plain water, plus the magic touch of organic additives like rich compost and incredible worm castings. These aren’t just “food” for your plant; they help build a strong, resilient root system and ultimately, a more robust, flavorful basil plant.
So next time you’re propagating, remember the oxygen rule! Your plants will thank you with lush growth and deliciousness.
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CREDITS
Hosted by: Brandi Warren & Colin Hayles
Voiceover by: Kaelan Shimp
Music by: Forestmusic

