Botanical name: Pilosocereus leucocephalus Pot Size: 1 gallon Sun requirement: Indoor Care instructions: Do not overwater this cactus. Once a week is sufficient in the summer time, and space out watering further in the wintertime. Public discussion (4) unikorn_plants 9 days ago is this a wholly blue torch? gardeneur 9 days ago It is wooly blue torch. Pilosocereus leucocephalus unikorn_plants 9 days ago thank you, about how tall? gardeneur 8 days ago 8-9" tall from soil, 15" tall from bottom of the pot You must log in to send a new comment.