Love poppies? Sow seeds now (late summer/early autumn) for a fine summer display. Look for Oriental poppy seeds (available from garden retailers and online mail-order nurseries) and start the seed in pots or directly in the garden.
Poppy seeds are tiny, so some gardeners like to mix them with a little sand to ensure they spread out better. I can’t be bothered with that. You can simply pour them into the palm of your hand, pinch up a few and sow them where you want. You can thin them later if necessary to give individual plants room to grow. There’s no need to cover the seeds: simply press them into the soil and water.