Flower
Can you grow Lobelia on a balcony?
Lobelia erinus
Yes — great in containers
Lobelia (Lobelia erinus) grows well on a balcony in a suitable container. It needs partial shade — around 4+ hours of direct sun a day. Flowers from late spring until autumn.. All figures below are sourced from RHS and the Old Farmer's Almanac.
Sun
⛅ Partial shade (4+ h)
Water
High
Difficulty
Moderate
Hardiness
Annual
Container fit
Excellent
Sow
Tender perennial grown as an annual; sow under glass in late winter to early spring and plant out after frost.
Harvest
Flowers from late spring until autumn.
Good companions: Popular in mixed bedding and baskets alongside other summer annuals
Balcony tip: Ideal as a trailing filler in hanging baskets and patio containers, especially in partial shade; keep the compost reliably moist and feed fortnightly for continuous flowering.
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Häufige Fragen
What size pot does Lobelia need?
Container size for Lobelia isn't specified by our sources for a single value — as a rule, give roots room and don't let a small pot dry out. Check the linked RHS/Almanac page.
How much sun does Lobelia need on a balcony?
Lobelia wants partial shade — about 4+ hours of direct sun daily. Match it to your balcony's aspect before buying seed.
When do you sow Lobelia?
Tender perennial grown as an annual; sow under glass in late winter to early spring and plant out after frost.. Timing shifts with your climate/USDA zone — the linked sources give the detail.
Sources & date
- RHS: Lobelia
- Data as of: 2026-07-10
- Container sizes and timings are guidance — adjust to your climate/USDA zone and balcony aspect.