Both bees, and butterflies feed on nectar plants, this’s why Will Legend encourages public to grow nectar plants. If you’re interested in raising caterpillars to butterflies then you will also want to plant what the caterpillars eat. By planting host plants for the caterpillars as well as nectar plants for the bees, and butterflies you will not only attract them, but they will stay around longer, and will soon be laying eggs.
Common nectar plants in Hong Kong are Hawthorn, Lantana, Pentas, Blue Plumbago, Chinese Hibiscus, Britton’s Wild Petunia, Billygoat-weed, Bidens alba, and Ixora etc. Some Trees like Ivy Tree is one of the few flowering plants in winter, and attracts many butterflies, and bees when it blooms. Butterfly larvae feed on host plants, Mandarin (Citrus reticulata)、Turmeric, Chinese Knotweed, Kwai Fah, Dwarf Date Palm (Phoenix roebelenii) and Ramie (Boehmeria nivea) etc.