I cut in late February through March. Leave 6-8" on the plant if you want it to grow new branches. I allow the cuts on the plant to dry for a day and then apply DAP cedar tub and tile sealant. The cuttings dry for a week to 6 months before planting in a well draining soil mixture usually containing pumice and or perlite. The planted cutting are in small black nursery pots and are watered once and then placed on hot concrete or a heat pad. The stem holds water for rooting so do not water until leaves open as early water will encourage rot of the stem. Your two foot branch will root easier but it depends on what you want. Good luck