20 BIRDHOUSE GOURD (Hard Shelled Gourd / Calabash) Lagenaria Siceraria Vine Seeds COLOR: Green gourds and white flowers HARVEST: 100 - 125 Days PLANT HEIGHT: 12 - 15' Vine . . . PLANT SPACING: 4 - 6' LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average Birdhouse Gourd Vines will happily climb up trellises, fences, porch supports, etc. The produce 8-10 inch gourds that are popular for crafting into birdhouses. As you can see from the pictures, there are an unlimited number of design possibilities. The gourd can be dried and then painted, carved, cut, or drilled as if they were made of wood. They make perfect homes for the Wren, Swallow, Nuthatch, Tufted Titmouse, Bluebird, Purple Martin, or Flicker.