Winter Bougainvillea Propagation by Layering

Rooting Bougainvillea in a Winter Greenhouse

Garage converted to winter plant house with lights, temp/humidity control. Heard winter propagation possible, but only first-year growth?

Clarification

Nick: Tip cuttings work, but easiest is layering: scrape bark on low branch, bury in soil beside mother. Roots in months (slower in winter). Cut and transplant. Traditional cuttings need hormone, damp vermiculite, bag, shade, misting.