Fill Your Garden Now With These 10 Fast-Growing Perennials

Love a flower that keeps on coming back? Then you'll love a perennial.

Every garden needs both annuals and perennials, but the problem with perennials is they can take a long time to get established. Gardeners even use the saying, "sleep, creep, leap" to identify the phases this type of plant will go through before fully maturing.

The first year, perennials will grow slowly while they establish their roots. The second year, perennials grow a little faster. Then the third year is when perennials really take off and start spreading throughout your garden.

But if you're an impatient gardener, you may want your perennials to mature and flower in their first growing season. If that's the case, you'll want to plant these 10 fast-growing perennials.

Agastache (Agastache foeniculum)