Zone 9 Coverage
Planting Timeline — All Varieties
Growing Alliums in Zone 9
Zone 9's nearly 10-month growing season and mild winters create exceptional conditions for growing alliums, but the long, hot summers require careful variety selection. The key advantage here is your ability to grow both short-day and intermediate-day onions, plus cold-hardy garlic varieties that still get enough chill hours during your December-February period. However, the extended heat from June through September means you'll want to focus on varieties that can bulk up quickly in spring before summer stress sets in.
When selecting alliums for Zone 9, prioritize heat tolerance and appropriate day-length requirements. Short-day varieties like Vidalia and Candy onions will start bulbing when days reach 10-12 hours, perfect for your climate. For garlic, hardneck varieties like Music and German Extra Hardy will thrive with your winter chill hours, while softneck types may struggle to form proper bulbs. The varieties listed here have proven themselves in Zone 9's unique combination of mild winters and intense summer heat.
Your extended growing season also opens up opportunities for succession planting and multi-season harvests. You can start garlic and shallots in fall, plant onions from transplants in late winter, and even squeeze in a second planting of quick-maturing varieties like Japanese Bunching Onions in late summer for winter harvest.
Variety Comparison
| Variety ↑ | Days | Difficulty | Size | Type | Indoor | Harvest |
|---|---|---|---|---|---|---|
| Candy Onion | 100-110 | Easy to moderate | 3-4 inches diameter, medium to large | Hybrid | November–December | April–June |
| Evergreen Hardy White | 65-120 | Easy | Pencil-thick stems, 12-18 inches useable length | Heirloom | December–October | March–December |
| French Gray Shallot | 90-120 | Easy to moderate | 1-2 inches diameter, 6-12 bulbs per cluster | Heirloom | — | April–July |
| Garlic Chives | 60-90 from seed, continuous harvest | Easy | Leaves 12-18 inches long, 1/4 inch wide | Heirloom | November–December | March–December |
| Georgia Fire Garlic | 240-270 | Easy | 2-3 inch diameter bulbs with 8-12 cloves | OP | — | July–August |
| Giant Musselburgh | 120-150 | Moderate | Up to 3 inches diameter, 12-18 inches white stem length | Heirloom | October–November | April–July |
| Italian Red Torpedo Onion | 95-110 | Moderate | 3-4 inches long, 2-3 inches wide | Heirloom | November–December | May–July |
| Japanese Bunching Onions | 65-120 depending on desired size | Easy | Pencil-thick to 3/4 inch diameter stems | Heirloom | — | March–February |
| Purple Top Walla Walla | 125-300 | Moderate | 3-5 inches diameter, 8-16 oz | Heirloom | November–December | May–September |
| Purplette | 60-70 | Easy | 1-1.5 inches diameter, pearl onion size | Hybrid | December–February | April–November |
| Red Baron Shallots | 90-120 from sets | Moderate | 2-3 inches long, 6-8 bulbs per cluster | Hybrid | — | May–June |
| Red Carpet Chives | 75-90 from seed, continuous harvest | Very easy | Individual flowers 1/2 inch, in rounded clusters | OP | November–January | March–December |
| Rossa di Milano | 95-105 | Easy to moderate | 3-4 inches diameter, medium size | Heirloom | November–December | April–June |
| Stuttgart | 110-120 | Easy | 3-4 inches diameter, medium to large | Heirloom | November–December | May–July |
| Vidalia Onion | 110-120 | Moderate | 3-4 inches diameter, 8-12 oz | Hybrid | November–December | May–June |
| Yellow Sweet Spanish Onion | 110-120 | Easy | 3-5 inches diameter, 8-16 oz | Heirloom | November–December | May–June |
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.
Georgia Fire Garlic
A robust softneck garlic variety that thrives in warmer climates where hardneck varieties struggle. Known for its reliable bulb formation and excellent storage qualities, producing plump bulbs with creamy white skin and a bold, spicy flavor. This variety is perfect for southern gardeners who want to grow their own garlic successfully.
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.
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.
Japanese Bunching Onions
Also known as scallions or green onions, these non-bulbing perennial onions produce tender, mild-flavored shoots that can be harvested continuously throughout the growing season. Unlike regular onions, they form clumps that multiply over time, providing an endless supply of fresh green onions for cooking. They're incredibly versatile, cold-hardy, and perfect for gardeners who want a low-maintenance crop that keeps producing year after year.
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.
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.
Vidalia Onion
The famous sweet onion from Georgia, prized for its mild flavor and exceptional sweetness that allows it to be eaten raw like an apple. These large, golden onions have become synonymous with Southern cooking and are perfect for caramelizing, grilling, or enjoying fresh in salads. Their low sulfur content and high sugar content make them a favorite among gardeners who want to grow restaurant-quality sweet onions at home.
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 9 Growing Tips
Start your allium year in October by planting garlic cloves and shallot bulbs – varieties like Music Hardneck and French Gray Shallots need those crucial chill hours between December and February to form proper bulbs. Plant them 4-6 weeks before your average first frost to allow root development without top growth. For onions, start seeds indoors in December or January, then transplant outside 4-6 weeks before your last frost date, typically around January 10-15.
Your biggest challenge in Zone 9 is the transition from spring to summer – onions need consistent moisture and moderate temperatures to size up properly, but once June hits, they're facing serious heat stress. Mulch heavily around plants in April and ensure deep, consistent watering. Consider shade cloth during the hottest part of summer if you're growing late-maturing varieties. Many successful Zone 9 gardeners harvest their main onion crop by late May or early June, well before peak summer heat.
Take advantage of your long season by planting heat-tolerant varieties like Japanese Bunching Onions and chives in late August for fall and winter harvests. These can handle your mild winters and provide fresh alliums when your main crop is in storage. Also, don't overlook the opportunity to cure your garlic and onions during those hot, dry summer months – your low humidity is perfect for proper curing.
Season Overview
Zone 9's February 15 average last frost and December 1 first frost create a generous 290-day growing season that's ideal for alliums with longer maturation periods. This extended season means you can plant garlic and shallots in October, harvest them in June, and still have time for a second crop of quick-growing varieties like chives or bunching onions. The mild winter temperatures rarely damage properly established alliums, but the trade-off is selecting varieties that can handle your intense summer heat and humidity. Plan your main onion harvest for late May through June to avoid the stress of peak summer temperatures.