When to Plant Flowers in Canada: A London, Ontario Guide

Canada's vastness makes "when to plant" impossible to answer nationally. But London, Ontario—nestled at the Thames River forks—offers a clear case study for Great Lakes gardening.

London's Growing Window

• Last frost: Early May
• First frost: Early October
• Season: ~6 months
• Climate: Cold snowy winters, hot humid summers, fleeting spring/fall, ample rain

Strategies for Success

• Start indoors: Seeds, cuttings, or nursery starts gain crucial weeks.
• Plant when soil works: Crumbly, not clumping. Cool-loving sweet peas go early; warm-soil seeds wait.
• Fall bulbs: Plant autumn for spring color before annuals are ready.
• Perennials: Flexible planting through the warm season; they self-time emergence.

Local Intelligence

Visit Victoria Garden (15 acres, 1M+ annual visitors) and municipal parks. What thrives there thrives in your yard. Native wildflowers are foolproof.

Year-Round Flowers

When outdoor gardens sleep, London florists deliver same-day. Order online or by phone—specify occasion, budget, and let designers work their magic.

Short answer: Plant after early May frost. Better answer: Observe local success, start early indoors, and enjoy flowers every day of the year.