Gollum is easily grown from leaf cuttings. Select a nicely shaped leaf and detach it carefully from the plant. Allow the end to scab over over the next day or so and then dib the end into a gritty mix. It will root in a few weeks.
Pot on slowly, increasing the pot size only gradually. Use a gritty well drained mix
Ensure that temperatures are mild (minimum night temperatures should be around 10°C / 50°F) and all chance of frost has passed before planting out, as Gollum is a half hardy plant.Trumpet Jade