Zone 5 Coverage
Planting Timeline — All Varieties
Growing Alliums in Zone 5
Zone 5 offers allium growers a sweet spot of cold hardiness and adequate growing season length, making it possible to grow both long-season storage onions and quick-maturing varieties. The reliable winter chill satisfies the vernalization requirements that hardneck garlics and shallots need to form proper bulbs, while the 155-day growing season provides enough time for large storage onions to reach full size. However, the late spring frost date means you'll need to be strategic about timing, especially with transplants that can bolt if exposed to prolonged cold after getting established.
When selecting allium varieties for Zone 5, prioritize those bred for northern climates or specifically noted as cold-hardy. Long-day onion varieties are your best bet since they're triggered to bulb by the extended daylight hours of northern summers. For garlic, focus on hardneck varieties that can handle your winters and will produce scapes as a bonus harvest. The key is matching variety day-length requirements and cold tolerance to your specific microclimate—these selections have proven themselves reliable performers in Zone 5 conditions, offering everything from sweet fresh eating to excellent storage characteristics.
Variety Comparison
| Variety ↑ | Days | Difficulty | Size | Type | Indoor | Harvest |
|---|---|---|---|---|---|---|
| Candy Onion | 100-110 | Easy to moderate | 3-4 inches diameter, medium to large | Hybrid | February–March | July–September |
| Evergreen Hardy White | 65-120 | Easy | Pencil-thick stems, 12-18 inches useable length | Heirloom | February–August | May–November |
| French Gray Shallot | 90-120 | Easy to moderate | 1-2 inches diameter, 6-12 bulbs per cluster | Heirloom | — | July–August |
| Garlic Chives | 60-90 from seed, continuous harvest | Easy | Leaves 12-18 inches long, 1/4 inch wide | Heirloom | February–March | June–November |
| German Extra Hardy Garlic | 240-270 (planted fall, harvested mid-summer) | Easy | 2-2.5 inches diameter, 4-6 cloves per bulb | Heirloom | — | June–July |
| Giant Musselburgh | 120-150 | Moderate | Up to 3 inches diameter, 12-18 inches white stem length | Heirloom | January–February | July–October |
| Giant Red Beard | 90-120 from planting to bloom | Easy | 6-inch diameter flower heads on 3-4 foot stems | Hybrid | — | May–June |
| Italian Red Torpedo Onion | 95-110 | Moderate | 3-4 inches long, 2-3 inches wide | Heirloom | February–March | July–September |
| Music Hardneck Garlic | 240-270 | Easy | 2-3 inch diameter bulbs, 4-6 large cloves per bulb | Heirloom | — | June–July |
| Purple Top Walla Walla | 125-300 | Moderate | 3-5 inches diameter, 8-16 oz | Heirloom | January–February | July–October |
| Purplette | 60-70 | Easy | 1-1.5 inches diameter, pearl onion size | Hybrid | February–March | June–September |
| Red Baron Shallots | 90-120 from sets | Moderate | 2-3 inches long, 6-8 bulbs per cluster | Hybrid | — | July–August |
| Red Carpet Chives | 75-90 from seed, continuous harvest | Very easy | Individual flowers 1/2 inch, in rounded clusters | OP | February–March | June–October |
| Rossa di Milano | 95-105 | Easy to moderate | 3-4 inches diameter, medium size | Heirloom | February–March | July–September |
| Siberian Garlic | 240-270 | Easy | 2-2.5 inches diameter, 8-12 cloves per bulb | Heirloom | — | June–July |
| Stuttgart | 110-120 | Easy | 3-4 inches diameter, medium to large | Heirloom | February–March | July–September |
| Yellow Sweet Spanish Onion | 110-120 | Easy | 3-5 inches diameter, 8-16 oz | Heirloom | February–March | July–September |
Variety Details
Candy Onion
A modern hybrid onion that lives up to its name with exceptionally sweet, mild flavor and crisp texture that's perfect for eating fresh. This intermediate-day variety produces beautiful golden-yellow bulbs with excellent uniformity and impressive size. Developed specifically for fresh eating, it's sweet enough to bite into like an apple yet stores reasonably well.
Evergreen Hardy White
The ultimate perennial onion for gardeners who want fresh green onions year-round with minimal effort. This Japanese bunching onion forms attractive clumps that multiply each year, providing continuous harvests of mild, tender shoots that never form bulbs. Incredibly cold-hardy and virtually maintenance-free once established.
French Gray Shallot
The gourmet cook's dream shallot, prized by French chefs for its complex, wine-like flavor and firm texture that holds up beautifully in cooking. These traditional gray-skinned shallots multiply from single bulbs into clusters of 6-12 bulbs with rose-colored flesh and incredible storage life. Their sophisticated flavor is milder than onions but more complex than garlic.
Garlic Chives
A versatile perennial herb that produces flat, grass-like leaves with a delicate garlic flavor and beautiful white star-shaped flowers in late summer. Unlike regular chives, garlic chives offer a mild garlic taste without the bite, making them perfect for Asian cuisine and as an attractive edible landscape plant. They're incredibly easy to grow, self-seed readily, and provide continuous harvests throughout the growing season.
German Extra Hardy Garlic
A robust hardneck garlic variety that lives up to its name by surviving the harshest winters while producing large, flavorful bulbs with 4-6 cloves each. This porcelain-type garlic offers excellent storage life and a rich, complex flavor that becomes sweet and nutty when roasted. It's an ideal choice for northern gardeners who want reliable garlic production and the bonus of edible scapes in early summer.
Giant Musselburgh
A legendary Scottish heirloom leek that produces enormous, thick white stems up to 3 inches in diameter and excellent cold hardiness. This impressive variety has been grown since the 1830s and remains a favorite for its mild, sweet flavor and ability to overwinter in harsh climates. Giant Musselburgh is the go-to choice for gardeners wanting impressive leeks for soups and braising.
Giant Red Beard
A showstopping ornamental allium that creates dramatic 6-inch purple globes on tall stems, making it a favorite for cutting gardens and perennial borders. This Dutch hybrid blooms in late spring with hundreds of star-shaped flowers that attract beneficial insects and dry beautifully for arrangements. The spherical flower heads are perfectly geometric and long-lasting.
Italian Red Torpedo Onion
An elegant elongated onion with stunning deep red skin and crisp white flesh streaked with purple rings. This intermediate-day variety offers a perfect balance of sweet and sharp flavors that mellows beautifully when cooked. The distinctive torpedo shape and vibrant color make it a standout in both the garden and on the plate.
Music Hardneck Garlic
The gold standard of hardneck garlic varieties, prized by both home gardeners and gourmet chefs for its exceptional flavor and reliability. Music produces large, easy-to-peel cloves with a perfect balance of heat and sweetness that intensifies when cooked. This Italian heirloom is incredibly cold-hardy and stores beautifully for 8-10 months.
Purple Top Walla Walla
The sweet, mild onion that made Walla Walla, Washington famous. This beloved heirloom variety produces large, flattened bulbs with purple-tinged skin and crisp white flesh so sweet they can be eaten like apples. Perfect for those who want to grow their own version of this premium market onion.
Purplette
A charming purple pearl onion that's incredibly easy to grow and perfect for pickling, cocktail garnishes, and gourmet cooking. These golf ball-sized beauties mature quickly and can be harvested at various stages from scallion to small bulb. Purplette's sweet, mild flavor and stunning deep purple color make it a favorite among home gardeners who want something special for their kitchen.
Red Baron Shallots
A premium French-type shallot with beautiful reddish-purple skin and crisp white flesh tinged with purple rings that adds both flavor and visual appeal to any dish. These elongated bulbs multiply underground to produce clusters of 6-8 shallots per plant, offering exceptional value and storage life. Their complex, wine-like flavor is more refined than onions, making them a favorite among gourmet cooks and essential for French cuisine.
Red Carpet Chives
A stunning ornamental chive variety that produces masses of vibrant rose-red flowers above dense clumps of slender green foliage. Beyond its beauty, this perennial herb offers the same mild onion flavor as regular chives, making it both a gorgeous garden accent and a useful culinary herb. The flowers are edible and make beautiful garnishes.
Rossa di Milano
This stunning Italian heirloom red onion produces deep crimson bulbs with crisp, white flesh streaked with purple rings. Known for its mild, sweet flavor and beautiful appearance, it's perfect for fresh eating and adds dramatic color to salads and sandwiches. Rossa di Milano thrives in warm climates and matures earlier than many storage onions.
Siberian Garlic
An extremely hardy hardneck garlic variety that survives brutal winters and produces beautiful purple-striped bulbs with complex, robust flavor. This reliable performer sends up dramatic curling scapes in summer and develops 8-12 cloves per bulb with excellent storage life. Siberian is perfect for northern gardeners who want dependable garlic with gourmet flavor and stunning appearance.
Stuttgart
A classic German heirloom onion prized for its exceptional storage life and reliable performance in cool climates. This flat-topped yellow onion develops firm, dense bulbs with crisp white flesh and a pleasantly sharp flavor that mellows beautifully when cooked. Stuttgart's outstanding keeping quality makes it a favorite among gardeners who want to store their harvest through winter.
Yellow Sweet Spanish Onion
A classic long-day onion variety beloved for producing enormous, mild-flavored bulbs that can reach softball size or larger. These golden-skinned beauties are incredibly versatile in the kitchen, sweet enough to eat raw yet substantial enough for cooking. Perfect for northern gardeners who want to grow impressive onions that store well through winter.
Zone 5 Growing Tips
Timing is everything with alliums in Zone 5, and each type has its own schedule. Plant garlic cloves in mid to late October, about 4-6 weeks before your first hard frost, giving them time to establish roots but not shoots before winter. Start onion seeds indoors in late February to early March, then transplant seedlings outdoors 2-3 weeks before your last frost date—they can handle light frosts once established. Direct seed onions and leeks in early to mid-April, as soon as your soil is workable.
Shallots and multiplier onions can be planted either in fall (late September to early October) for larger bulbs, or in early spring alongside your onion transplants. The fall-planted sets will overwinter like garlic and give you an earlier, often larger harvest. Japanese bunching onions and chives are your most forgiving crops—plant them anytime from early spring through late summer. For season extension, focus on proper soil drainage during spring thaw and consider raised beds if your garden tends to stay soggy, as waterlogged alliums are prone to rot in Zone 5's freeze-thaw cycles.
Season Overview
Your last frost date around April 30th and first frost around October 5th creates a reliable 155-day growing season that's ideal for most allium varieties, though you'll want to harvest garlic and shallots by mid-July regardless of frost dates. The length of your season means you can successfully grow long-season storage varieties like Stuttgart onions and Giant Musselburgh leeks, which need the full summer to reach maturity. Start planning your allium garden in late winter, as many varieties need to be ordered and planted well before the typical vegetable garden gets started—garlic goes in the ground while you're still harvesting pumpkins, and onion seeds need to be started indoors while snow might still be on the ground.