Debunking Two Popular Plant Container Myths
Rocks Improve Drainage Myth
Many gardeners believe that rock, bits of pottery, even oyster shells covering the bottom of a pot improves drainage. This tip, handed down through generations of gardeners, causes the opposite outcome. A shallow container holds more water per unit than a deeper one. Essentially, placing gravel or other non-absorbent media at the bottom of a pot makes it more shallow, and in return, compromises the drainage.
The other problem with this method is that water does not move easily from a soil medium into a coarser material. If drainage is a problem in your containers, switch to high-quality potting soils for your flowerpots.
The Myth of Polymer Crystals
I don't recommend water crystals for keeping containers hydrated. They may be useful for craft projects, but polymer water crystals are a waste of money for the garden container. The additive will actually steal moisture from the plants to remain hydrated. The scoundrels!
Recently, I've noticed people recommending the use of disposable baby diapers at the bottom of their potting containers, because the diapers contain the polymer crystals to absorb liquid. As mentioned above, they have the same moisture stealing qualities when they begin to dry out. Absorbing moisture is excellent when you want to keep a baby's bottom dry, yet not so great when you are trying to keep your soil moist.
The best way to keep your containers hydrated is to water them when necessary. Switch to bigger pots, as they won't dry out as quickly.
Are you still worried? Put your containers on an automated drip system, and then you can ensure they will never dry out.
If you want to know more about the plants in this container, click here.
Debbie Teashon
Photographed in author's garden.
Gardening for the Homebrewer: Grow and Process Plants for Making Beer, Wine, Gruit, Cider, Perry, and More
By co-authors Wendy Tweton and Debbie Teashon (Rainy Side Gardeners)
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