Begonia Flower Seeds

About Begonia Flower Seeds

Begonia Flower Seeds grow in full sun, partial shade positions. Expect 12 to 15 inches or 28 to 34 inches at maturity. Flowering runs spring through fall. The figures below are the ones on the packets in this group; each product page carries the exact numbers for that variety.

When to plant

Plant in early spring. Start seed indoors and move the seedlings out once the danger of frost has passed. Hardy in zones 10 to 11 — your local frost dates decide the exact week.

Where to plant

Choose a site in full sun, partial shade. Water needs are average once the plants are established. Free-draining soil matters more than rich soil; seed sown into ground that stays wet rots before it germinates. Allow 12 to 15 inches or 32 to 36 inches between plants so air can move between them. Plan for 12 to 15 inches or 28 to 34 inches of growth when you place them in a bed or border.

How to plant

Sow 1/8 inch deep, spaced 12 to 15 inches or 32 to 36 inches apart. This seed needs light to germinate, so press it onto the surface and firm it in rather than burying it. Water gently to settle the soil, then keep the surface evenly moist until seedlings or shoots appear. Indoor starts do best in warmth and bright light; harden the seedlings off over a week before planting out.

How to care

Keep watering average, at the base of the plant rather than over the leaves. In zones 10 to 11 these come back each year: let the foliage die down naturally after flowering, since that is what feeds next season's growth. Flowers appear spring through fall; cutting or deadheading regularly keeps more coming.

Find your growing zone All planting guides