Posted: 27/06/2014 at 15:30
Lilies like lots of water and food but not poor drainage, are you on clay soil? I always do mine in pots, when I had some in the border they were much smaller and more difficult to check for pests. You could mulch the border each year to keep moisture in and improve soil structure over time and if you get a dry spell water them. We've had 3 weeks of sun and I've had to water my wet, shady border because it had dried solid.