What Are Annuals? A Beginner's Guide to Seasonal Color

Standing in the nursery aisle, you’re asked: “Annuals or perennials?” If you’re unsure, think of marigolds—schoolchildren grow them for Mother’s Day because they’re cheap, easy, and bloom nonstop for months. That’s the essence of an annual: a flowering plant that delivers continuous color for a single season.

Definition and Life Cycle

“Annual” is a functional, not strictly botanical, term. These plants are geared to produce abundant flowers and seeds, then die—from exhaustion, frost, or drought. Exceptions exist, but generally, an annual gives you months of nonstop bloom.

Popular Annuals

Besides marigolds: zinnias, impatiens, cockscomb, bachelor’s buttons, sweet alyssum, geraniums, petunias (the most award-winning annual with 31 RHS Awards of Garden Merit), pansies, sunflowers, cosmos. They’re sold as seed packets or “6-pack” starter plants.

Design Tips

• Limit colors to complementary pairs (purple/white, yellow/blue) to avoid a chaotic look.
• Incorporate foliage annuals like coleus for texture.
• Place tall annuals where they won’t block shorter plants.
• Space small starter plants 6 inches apart for quick fill.

Growing from Seed

Seed catalogs offer wider variety. Choose based on your sun/shade conditions and mature plant size. One packet seeds 5–10 suburban gardens. Start indoors 8–12 weeks before planting out; sow outdoors at the same time as nursery plants. Cover seeds only as deep as directed, keep moist until sprouts appear. Seed-grown plants lag behind nursery starts but cost far less.

Maintenance and End-of-Season

Deadhead spent blooms to prolong flowering. Water regularly, fertilize occasionally. In freeze-prone areas, summer annuals die at frost; in hot climates, cool-season annuals (pansies) provide winter color. Some annuals (larkspur, love-in-a-mist, California poppy, baby’s breath) are naturally short-lived. When plants decline, remove remains, amend soil with compost, mulch, and rest the bed until next season.

With this basics, you can confidently answer “I want annuals!” and enjoy a full season of color.