Hi. We have a long, wide border outside of our flat which is ours to plant up, which we do every year and it always looks very nice. At the far end, in between some small shrubs and a large conifer there's a space of about 1m, which always looks a little untidy. I put an ad on Gumtree and a very kind local chap donated some nice stones from his rockery, and it's my aim to make my own mini one to fill that space, but I've no idea about plants. Ideally we're after plants that will offer colour and spread like crazy - totally happy for the plants there to take over. They'll be going into generic garden centre compost. I was thinking of popping in a few Lobelia, which are a failsafe of ours, but any other suggestions would be very welcome. We replant the entire bed each spring, so annuals would be fine, but happy to leave any perennials in that would survive winter. Thanks.