When to Plant Sweet Alyssum in Sterling Heights, Michigan (48310)

Location

Sterling Heights, Michigan

ZIP Code

48310

USDA Zone

Last Frost

Wednesday, April 15, 2026

📅 Planting Calendar

Direct Sow Outdoors Wednesday, March 18, 2026

Pro Tip: Sow Sweet Alyssum directly outdoors 4 weeks before your last frost date.

🌿 Plant Details

Scientific Name Lobularia maritima

Days to Maturity 45 days

Mature Height 4-8"

Spread 9"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Moderate (1 inch/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 5-10 days

Ready to Plant Sweet Alyssum in Sterling Heights?

Get your seeds now so they're ready by Wednesday, March 18, 2026.

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Other Plants for Sterling Heights

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Growing Sweet Alyssum in Zone 6b

Sweet Alyssum (Lobularia maritima) is a popular garden vegetable. In Sterling Heights, Michigan, which is in USDA Hardiness Zone 6b, you should direct sow seeds around Wednesday, March 18, 2026.

Your average last frost date is Wednesday, April 15, 2026. Sweet Alyssum grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.