Posted: 23/03/2016 at 10:17
Bear in mind that biennial flowers won't flower this year and perennials from seed can take a bit of time to get going, may not flower this year and won't be a decent size for 2 or 3 years. Much cheaper than buying as a big plant but needs patience. I prefer to buy small plants from the garden centre and pot them on until a reasonable size to plant out. Otherwise slugs and insects may get them or they may just disappear.
Meconopsis can be tricky, needs acid, damp soil in a shady place.