Cold hardiness

Future

2050

2100

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.

Now

Zone 6b

USDA

Published baseline for this location from 1991-2020.

Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer

Well-suited

2050

Zone 7a

Plotwright

Projected zone for this same location in 2050 (2041-2070) using SSP3-7.0 (regional rivalry).

Well-suited

In plain terms: This location is in Zone 6b today. Its hardiness profile is cold winters, and coldest nights are typically around -3°F. By 2050, the projected hardiness zone is Zone 7a based on SSP3-7.0 (regional rivalry). That is a +0.5-zone shift from Zone 6b to Zone 7a by 2050.

✓

Well-suited today and still thriving in 2050.

Heat tolerance

Future

2050

2100

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.

Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 45 ecoregions — 45 climate-resilient through 2070. Best matches first.

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Arizona Mountains forests

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Atlantic coastal pine barrens

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Blue Mountains forests

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California coastal sage and chaparral

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Canadian Aspen forests and parklands

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Central Pacific Northwest coastal forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

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What it needs

Conditions

Light

Full sun

Water

Moderate water

Spacing

18"

Habit

Clump-forming herbaceous perennial from a crown; ferny summer top growth

Care tips

•

Site the bed for the long haul — a healthy asparagus planting produces for 15+ years, so choose full sun and rich, well-drained soil you will not need to dig up.

•

Be patient: let spears grow into fern for the first 2-3 years to build the crown, then harvest in April-May while spears are still tight.

•

Choose all-male hybrids if you want maximum yield and to avoid self-seeding from the red berries of female plants.

Lifecycle

Planting

Usually planted from roots (crowns) in early spring in average, medium, well-drained soil in full sun; prefers organically rich soil that stays evenly moist. May also be grown from seed, but that takes more care and about a year longer to first crop. Keep the bed free of weeds.

Transplanting

Asparagus resents disturbance once established and is best set as dormant crowns in early spring rather than moved; site the permanent bed carefully because the planting lasts many years.

Early growth

Roots take 2-3 years to produce a crop. Let spears grow into fern during the establishment years to build the crown rather than harvesting; keep the bed weed-free and evenly moist.

Maturity

Harvest spears in April-May while still tight; let later spears develop into 3-4 foot summer ferns that die back after frost. Plants are dormant in winter. Female plants set red berries that drop in autumn and can cause self-seeding.

Propagation

Standard propagation is one-year-old crowns planted in early spring; seed works but adds about a year. Male plants typically yield better, so many gardeners choose all-male hybrids.

Pollination

Dioecious — needs male pollinizer

Asparagus is dioecious: individual plants are either male or female (Missouri Botanical Garden PlantFinder). Only female plants set the late-summer red berries, while male plants spend no energy on fruit and typically give better spear yields, which is why all-male hybrids are popular. Flowers are small, white, and not showy.

For people

Parts edible

Grown as a vegetable for the young spears (shoots), harvested in early spring while very young and tender (Missouri Botanical Garden PlantFinder; NC State Extension Gardener Plant Toolbox). The red berries of female plants are not eaten.

Native range

AHS heat range

1-11

Climate notes

•

Missouri Botanical Garden PlantFinder lists Asparagus officinalis for USDA zones 3 to 10 in full sun with medium water, native to Europe and temperate Asia and grown as a perennial vegetable.

•

Easily grown in average, medium, well-drained soil; it prefers organically rich soil that is evenly moist (Missouri Botanical Garden PlantFinder). Not native to North America, so it carries no native-range designation here.

•

Missouri Botanical Garden PlantFinder notes asparagus beetles, Japanese beetles, and asparagus rust as the main pests, and that the plant tolerates rabbits, which tend to avoid it.

In the designer

Growth over time

36-48" tall · 18-24" spread

First full harvest of spears in April-May; mature ferns reach 3-4 feet through summer.

Design roles: Edible

Seasonal interest

Spring

Summer

Fall

Winter

Filled = the plant has seasonal interest · ▾ now = your current season

Asparagus

At a glance

Related products

Why it matters

Cold hardiness

Heat tolerance

Where this plant fits

What it needs

Lifecycle

Pollination

For people

Native range

Climate notes

In the designer

Seasonal interest

Sources & citations