Which plant is easiest to grow quickly?
Kale & Swiss Chard Are Quick-Growing Tall Plants. Cucumbers, Squash, & Zucchini Are Quick-Growing Veggies. Zinnias & Nasturtiums Are Fast-Growing Flowers. The fastest-growing is Chinese wisteria (Wisteria sinensis) but Japanese wisteria (Wisteria floribunda) isn’t far behind, and it has the biggest flowers. Whichever you choose, planting in a sunny sheltered spot means you’ll get the best flowers from your wisteria.Sunflowers, zinnias, nasturtiums, and spider flowers are all fastest growing plant flowers that bloom quickly from seed.