Perennial Flower

When to Plant Lavender in Connecticut

Fragrant, drought-tolerant, and beloved by pollinators. Once established, lavender rewards you for years.

The Short Answer

In Connecticut, plant lavender based on your regional frost dates. Northern Connecticut has a last frost around May 1 - May 15, while Coastal Connecticut sees frost end around Apr 15 - May 1. Four distinct seasons. Maritime influence moderates coastal temperatures. Shorter growing season inland.

Connecticut Frost Dates

Your planting dates depend on which part of Connecticut you're in. Here are the frost date ranges by region:

Region	Zones	Last Frost (Spring)	First Frost (Fall)
Northern Connecticut	5b, 6a	May 1 - May 15	Sep 25 - Oct 10
Coastal Connecticut	6b, 7a	Apr 15 - May 1	Oct 10 - Oct 25

Lavender Planting Schedule for Connecticut

Northern Connecticut (Zones 5b, 6a)

Average last frost: May 1 - May 15 · Average first frost: Sep 25 - Oct 10

Start Seeds Indoors

10 wks before frost

Transplant Outside

2 wks after frost

Coastal Connecticut (Zones 6b, 7a)

Average last frost: Apr 15 - May 1 · Average first frost: Oct 10 - Oct 25

Start Seeds Indoors

10 wks before frost

Transplant Outside

2 wks after frost

Growing Lavender in Connecticut

Lavender in Connecticut's Climate

Your climate supports lavender well with proper drainage. English and hybrid lavender (Phenomenal, Grosso) thrive in the neutral-to-alkaline soils common in limestone regions. The biggest mistake is overwatering — lavender is Mediterranean and prefers dry feet. Prune in spring after new growth appears, never into old wood.

Soil Considerations for Connecticut

Rocky New England soil common. Acidic in many areas. Raised beds popular for dealing with rocky ground.

Connecticut Climate & Growing Season

Four distinct seasons. Maritime influence moderates coastal temperatures. Shorter growing season inland.

Growing season length varies across Connecticut: Northern Connecticut (5b, 6a) has a last frost around May 1 - May 15, while Coastal Connecticut (6b, 7a) sees frost end around Apr 15 - May 1. This difference matters for lavender — adjust your planting dates to match your specific region.

Growing Tips

Needs excellent drainage — clay soil is lavender's enemy. Don't prune into old wood. English varieties (Lavandula angustifolia) are hardiest.

Companion Planting

Plant lavender alongside these companions for better growth:

Roses Thyme Sage

The Bottom Line

Lavender can be grown successfully across Connecticut, but your exact planting dates depend on which region you're in. Northern Connecticut gardeners should plan around a May 1 - May 15 last frost, while those in Coastal Connecticut can typically plant earlier. For exact dates based on your zip code, use our free planting date finder.

Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026