Another possible approach I've found to work is to leave unscrubbed wasteland around the edge of the tiles that will become forest, then build new scrubbers/greenhouses on the margin around the forest after the placing the arboretums. You need to plan ahead a little to make sure you can actually get power to those parts but otherwise its quite simple and can give quite a lot of tiles for fynbos.
ElMig
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A member registered Jun 14, 2020