USDA Zone 3
What to plant in zone 3.
Last frost around May 15. First frost around September 15. 92 curated flowers thrive here.
Bloom calendar for zone 3
Peaks in March
3 flowersPeaks in April
12 flowersPeaks in May
14 flowersPeaks in June
12 flowersPeaks in July
31 flowersPurple ConeflowerBee BalmDaylilyHostaYarrowPetuniaImpatiensAsiatic LilyButterfly WeedSweet AlyssumSpike SpeedwellHollyhockBlazing StarLeopard PlantBlanket FlowerCulver's RootPot MarigoldNasturtiumGarden VerbenaMoss RoseFlossflowerMadagascar PeriwinkleSummer SnapdragonWishbone FlowerDusty MillerBachelor's ButtonJapanese SpireaBlack-Eyed Susan VineSwamp MilkweedFalse SunflowerGray-Headed Coneflower
Peaks in August
17 flowersPeaks in September
3 flowersZone 3 planting questions
When is the last frost in zone 3?
The average last frost in USDA zone 3 is around May 15, and the average first frost is around September 15. Frost-tender annuals go in after the last frost.
Which flowers bloom longest in zone 3?
Of the 92 flowers we plan for in zone 3, the longest bloomers are Snapdragon, Petunia, Impatiens, Sweet Alyssum and Cosmos.
What flowers attract pollinators in zone 3?
Pollinator-friendly flowers that grow in zone 3 include Cosmos, Zinnia, Sunflower, Black-Eyed Susan and Purple Coneflower.
Which native flowers grow in zone 3?
North American natives that grow in zone 3 include Sunflower, Black-Eyed Susan, Purple Coneflower, Garden Phlox and Bee Balm.
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