It is best to move astilbe in the spring, when the soil is cool and moist. Moving now may be dodgy, unless you can control the soil temp and moisture (hard to do). Ah-ha: Maybe you could transfer it to a container?? If you do this (or if you move it) make sure that the soil is well-draining composted/organic material and keep it moist but not soaking; it should drain. As for its having barely grown, these are slow-growing plants but if given proper care/conditions will bloom for years.
It is best to move astilbe in the spring, when the soil is cool and moist. Moving now may be dodgy, unless you can control the soil temp and moisture (hard to do). Ah-ha: Maybe you could transfer it to a container?? If you do this (or if you move it) make sure that the soil is well-draining composted/organic material and keep it moist but not soaking; it should drain. As for its having barely grown, these are slow-growing plants but if given proper care/conditions will bloom for years.