Is red for danger? Hardly in a garden capacity, yet there are those who are afraid of this dynamic colour. Red is a strong colour and just a little can make a big difference. It's more a colour for summer, especially late summer gardens, when we can allow ourselves a final fling, a firework display.
In spring, red will mingle well with fresh greens and yellows. You might well prefer a muted red in spring. This often brash colour is quite accommodating as it comes in a variety of shades. Most popular in the garden are bright reds found in tulips to burgundy and muted maroons verging on purples of much popular foliage.
Red primulas brighten a bed of tulips. Flamboyant Hippeastrums and Pelargoniums make a windowsill look smart. Outdoors you can continue the flamboyant show with red lilies and stands of red fritillaries - the crown imperial. Rosettes of red Sempervivums are cheerful in tufa tubs or gravel. There is little lovelier than red roses that will start to bloom at the end of this season with a foretaste of summer.
It's easy to create a red foliage bed with Acer, Pieris, Photinia, Berberis, Heuchera, Cercis and Cercidiphyllum to name but a few. Most of these are often referred to as purple, but many are maroon based and will work well together colourwise.