Certain cultivars, like the 'Pugster Blue', produce deep indigo-blue flowers, while others lean more true purple, red, white, pink, or yellow. Butterfly bushes grow well in hardiness zones 5 to 10 ...

Hydrangeas are a flower power plant for summer gardens. They grow in hard-to-fill niches in garden plantings, or they can ...

Tap water, especially the kind you'll find in hard water areas, can be alkaline and cause blue-flowered hydrangeas to take on ...

So blue plants would reflect blue light, rather than absorbing all the energy it has to offer. This is not a great strategy if you want to maximize growth, which is why most plant stems and leaves ...

Plants make fruits and flowers look blue by shifting acidity levels, adding molecules or mixing pigments. Even then, it’s rare to see a blue plant with no reddish tint: ...