Posted: 03/05/2014 at 16:50
The number of plants needed depends on the plants you choose so check their height and width when making you selection so you can place them where you want them and in the correct numbers.
Other blue plants for spring are pulmonarias but check the variety you buy as some do all blue and some do pink and blue. They have attractive spotted foliage which can be refreshed by cutting it all back once flowering finishes and then giving a good drink and a bit of a feed. Also grape hyacinth, chinodoxia and scillas which are all bulbs and will die down 6 to 8 weeks after flowering finishes.
For oranges and pinks, look at hemerocallis, geums, potentillas, rudbeckias, oriental poppies, helianthemeums - all perennials which will come back each year.
If you want annuals, just go down to the garden centre and look at packets of seeds or their bedding displays.