Choosing veronicas by height for garden borders

All veronicas thrive in a sunny spot and are attractive to bees and butterflies, but there is a range of shapes and sizes to choose from. Some are upright with tall flower spikes upto 1.2m (4ft); while others are low growing and spreading, to 30cm (1ft) in height, making good plants for groundcover or a rock garden. Here are some taller and shorter options.