Annual Care Guide: From Seed to Stunning Blooms

Whether from seed or transplants, proper planting ensures a beautiful display. Starting from seed saves money—direct-sow sunflowers, cosmos, marigolds, bachelor’s buttons, poppies, balsam, morning glories, castor beans, larkspur in loose garden soil, or start indoors for a head start.

Learn more about growing from seed.

Planting transplants: Dig a hole twice the container width, no deeper. Loosen roots (especially if rootbound), set plant, backfill, water well.

Cool-season vs. warm-season: Cool-season annuals (pansy, viola, nemesia, diascia, osteospermum, flowering kale) thrive under 70–75°F; plant before last frost. Warm-season annuals (ageratum, angelonia, impatiens, begonia, morning glory, petunia, dusty miller, geranium, nasturtium, moss rose) need warm soil after last frost.

More Planting Tips

Water well after planting—most vulnerable the first weeks. Mulch 2–3 inches to retain moisture and suppress weeds. Once you’ve mastered annuals, try perennials.

Pinching

Pinch off the top couple inches of new growth to encourage branching—bushier, not lanky.

Watering

Needs vary: drought-tolerant types (lantana, California poppy, gazania, nasturtium, ptilotus, moss rose) may need no supplemental water once established; others need consistent moisture. Use a soaker hose—keeps foliage dry, reduces disease, delivers water to roots.

Deadheading

Snip faded flowers. It tidies plants, prevents unwanted seedlings (bachelor’s buttons, cosmos, calendula, etc.), and keeps many annuals blooming longer.

Learn more about deadheading.

Fertilizing

Rich soil or regular compost eliminates feeding needs. In poor soil or pots, use a general-purpose fertilizer per label—overfeeding reduces flowers, burns roots, or kills plants. Slow-release fertilizer in containers feeds all season with 1–2 applications.

Deadheading Your Garden