Annual Geranium (Pelargonium) in Zone 6a & 6b

Pelargonium hortorum

When to plant annual geranium (pelargonium) in zone 6b

Zones 6a and 6b share the same average frost dates in our data, so this page covers both.

Method: Start indoors: Start indoors from seed, then transplant outside. Annual Geranium (Pelargonium) needs a head start most zones can't give it by direct-sowing alone.

Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1-1.5 ft.

Annual geranium is the classic bedding and container plant most gardeners know from nursery six-packs, but it's grown here from seed instead, which means starting well ahead of the season rather than buying an already-blooming plant.

How annual geranium (pelargonium) fits zone 6's season

Zone 6b's frost-free window runs about 173 days, from April 25 to October 15. Annual Geranium (Pelargonium) needs about 90 days from transplant to first harvest.

Good companions

No standout companions recorded yet for Annual Geranium (Pelargonium).

Where to buy annual geranium seeds

• Botanical Interests
• True Leaf Market
• Burpee
• High Mowing Organic Seeds

See why we recommend these suppliers →

As an Amazon Associate we earn from qualifying purchases. Some links on this page also go to other retailers we may earn a commission from as an affiliate, at no extra cost to you. We only recommend products with a genuine consensus of positive, independent reviews. See the sources cited on each item.

See it growing

Search YouTube for "growing annual geranium (pelargonium)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)

← Back to the full zone 6b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →

Pin this for later

Growing Annual Geranium (Pelargonium) in USDA zone 6b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.

Save to Pinterest