Q: "How do I repot my plant when it is time to do so?" A: This question brings up a couple of idiosyncrasies about the rocks.
The first being the size of the hole that the plant has to go in, a two edged sword. On the one side, the smaller the hole in the rock, the more natural the end result; the plant looks as though it grew right out of a little crack in the rock. The downside being that the plant will be both harder to plant in the first place and the more difficult it will be to pot it up when the time comes. On the other side, the larger the hole, the less "natural" it seems to be, in my opinion. The upside of this being that the placement and repotting of the plant is much eaiser.
Because of these reasons I make rocks with a wide variety of opening sizes so as to please as wide a range of tastes as possible. For this reason as well in photographs of available work I include information on rock dimensions and include some reference to an actual measure to judge the size of the opening by.
I am predisposed to choose one of two types of plants to put in the rocks- palnts that are, generally speaking, smaller and slow growing, or plants that produce offsets that can be easily removed so as to essentially eliminate the need for repotting. However, if a plant is placed in a rock that must eventually be repotted, a solution I rely on is the use of a fine firm jet of water to wash out as much potting medium as need be to enable the plant removal. This is best done with a hose nozzle that can be adjusted to a tight jet, being careful to not use so much pressure that the plant or its roots are needlessly damaged. This same process can be used in the bottom of the rock where the drain hole is.