Gardening is unnatural. Yes; quite unnatural. So is landscaping. It all involves planting exotic plants from all over the World that would not otherwise be here, including many that are too extensively and unnaturally bred and hybridized to survive for long even in the natural ecosystems from which their ancestors were derived.
Unless they grow on their own, even native plants are not natural. Those that are native to the region may not be native to the specific site. Many that are grown in nurseries are unnaturally selected varieties or cultivars. To complicate matters, much of what seems to be natural out in forests and wild lands are invasive naturalized exotics.
The weather above and most of the soil below are natural, but both are commonly enhanced for our gardens. We water our gardens and landscapes as if the weather is insufficient. Soil amendments and fertilizers compensate for what we…