We are growing more and more of these popular plants and have some of most of these most years. Some take a year or two to flower. Some are infertile and can only be increased by divisions. Species can be kept going by collecting and sowing seed. Meconopsis are best planted in clumps or groups of 3-5 or more of the same which ensures a plentiful supply of fertile seed. Monocarpic species die after flowering.