When we say "practice the piano," we don't expect the results to be perfect. Part of developing a skill is making a lot of so-called "wrong moves." In this way we train our bodies and minds to move skillfully.
We have a meditation practice too, training our minds to move in skillful ways beginning with mindfulness and loving-kindness.
Gardening is also a practice. No one is perfect at it, not even the so-called experts. We practice by planting seeds or seedlings, annuals or perennials. As much as we might like to "do it right," we have to make a lot of "mistakes," a lot of "wrong moves." That's the reason i'm digging up that blue hydrangea i planted 4 years ago and moving it to a sunnier location.