Spring Seed Sowing Schedule: Your Ultimate Guide to Sowing Success This Season
Here is our sowing schedule for spring! From sweet peas in February to the careful selection of hardy and less hardy annuals in March and April, we have you covered with the dates we’ll be using this year.
Whether you follow our schedule or develop your own sowing rhythm tailored to your climate and needs, we hope this guide demystifies the process of organising the sowing of a diverse range of varieties each year.
February:
Sweet Peas – A Delicate Start
While February might be too early for most varieties—thanks to cooler temperatures and lower light levels—it’s the perfect month to get your sweet peas going. Sweet peas are one of those hardy flowers that can handle an early sowing, giving you a head start on a stunning spring display.
Sowing Dates for Spring Sown Sweet Peas
Friday, February 7th: Start sowing your sweet pea seeds.
Friday, February 28th: A second sowing session to boost your crop.
For extra pointers on sowing sweet peas this month, be sure to check out our detailed Sweet Pea Sowing Guide. Once your seedlings emerge, our Sweet Pea Growing Guide in our Resources section will help you nurture them from seedling to beautiful flowers.
March:
Hardy Annuals – Spacing Out the Work
As the weather and the light-levels improve, March is the ideal time to sow hardy annuals. We like to spread out these sowing sessions throughout the month to avoid overwhelm and ensure each variety gets the care it needs. This staggered approach helps manage our workload and ensures each crop receives the attention it needs for optimal growth. Here’s our March schedule:
March Sowing Schedule
Friday, March 7th
Ammi
Larkspur
Violas
Orlaya
Friday, March 14th
Calendula
Cerinthe
Cornflowers
Corncockle
Friday, March 21st
Cynoglossum
Lavatera
Nigella
Briza
Friday, March 28th
Poppies
Silene
Scabiosa
Strawflowers
April:
Less Hardy Annuals – A Timely Boost
For more delicate blooms, we wait until closer to the last frost date in April. This timing allows these sensitive varieties to establish without the risk of frost damage. Additionally, April sowing is perfect for filling in gaps in your garden plan or re-sowing areas affected by pest damage. We continue to sow more successions of flowers with quicker maturity times, like zinnias throughout May, and sometimes into June.
April Sowing Schedule
Friday, April 4th
Cosmos
Phlox
Amaranthus
Friday, April 11th
Zinnias
Asters
Nasturtiums