Best Garlic Varieties to Grow in Pennsylvania
Garlic is planted in fall (October–November) and harvested the following July — making it perfectly suited to Pennsylvania’s cold winters, which satisfy the vernalization requirement that hardneck varieties need to form proper cloves. PA’s climate strongly favors hardneck types, which are more flavorful and cold-hardy than softneck varieties. Understanding which type works in your specific zone is where garlic success begins.
The choice between Rocambole, Porcelain, and Purple Stripe hardnecks depends on your zone and how you plan to use your garlic. Get this decision right and growing garlic in Pennsylvania is almost foolproof — it’s a low-maintenance, high-reward crop that overwinters on its own, requires almost no in-season care, and delivers two harvests (scapes in June, bulbs in July).
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📅 Garlic Growing Calendar — Pennsylvania (Zones 5a–7a)
Scape Harvest
Bulb Harvest
Cure / Bed Prep
Fall Planting
Dormant
Garlic Zone Quick-Pick by PA Region
| PA Region | Zone | Best Types | Plant Window | Notes |
|---|---|---|---|---|
| Eastern PA — Philadelphia area | 7a | Rocambole, Porcelain, Softneck viable | Late Oct – mid-Nov | Widest selection in PA. Rocambole flavor peaks here. Softneck stores longer if long storage matters. |
| Western PA — Pittsburgh area | 6a | Porcelain, Purple Stripe — hardneck only | Oct 1–20 | Strong hardneck zone. Porcelain especially reliable — tight wrappers handle freeze-thaw better than Rocambole. |
| Central PA — Harrisburg / Reading / York | 6a–6b | Rocambole (6b), Porcelain, Purple Stripe | Mid-Oct – early Nov | Zone 6b sweet spot for variety diversity. All hardneck subtypes perform well. Purple Stripe excels for roasting. |
| Northern PA — Erie / Scranton / Mountains | 5a–5b | Porcelain only (Music, German White) | Sep 20 – Oct 10 | Porcelain hardnecks are cold-hardiness champions. Mulch heavily (4–6 in) after ground cools. Avoid Rocambole. |
🧄 Garlic Quick Reference — Pennsylvania
12 Garlic Varieties Compared: Complete PA Growing Guide
The best garlic varieties for Pennsylvania fall into four categories: Rocambole hardnecks (best flavor, moderate cold hardiness), Porcelain hardnecks (most cold-hardy, largest cloves, best for Zone 5), Purple Stripe hardnecks (great for roasting, mid-cold-hardiness), and Softneck / Artichoke types (longer storage, limited to warmer zones). Each type plays to different strengths depending on your zone and how you plan to use your harvest.
| Variety | Type | Cloves/Bulb | Flavor | Best PA Zones | Storage | Key Notes |
|---|---|---|---|---|---|---|
| German Red | Rocambole | 8–12 | Rich, complex | 6b–7a | 5–7 months | Excellent raw and cooked; slightly larger than Spanish Roja; top flavor for Zone 7a |
| Spanish Roja | Rocambole | 8–12 | Best raw flavor | 6b–7a only | 5–6 months | Classic Rocambole; too delicate for Zone 5; peak flavor when raw or lightly cooked |
| Chesnok Red | Purple Stripe | 10–14 | Excellent roasted | 6a–7a | 6–8 months | Holds flavor beautifully when cooked; more robust than Rocambole; roasting specialist |
| Music | Porcelain | 4–6 | Strong, hot | 5a–7a | 8–10 months | Top-selling hardneck in Northeast; large cloves; Zone 5 proven; most reliable PA performer |
| German White | Porcelain | 4–6 | Hot, pungent | 5a–7a | 8–9 months | Very cold-hardy; clean white wrapper; excellent for mountain regions; PA classic |
| Romanian Red | Porcelain | 5–7 | Hot, spicy | 6a–7a | 9–10 months | Large hot Porcelain; excellent PA performer; long-storing; wrinkly red-brown skin |
| Metechi | Purple Stripe | 10–12 | Very spicy raw | 6a–7a | 6–8 months | Georgian Purple Stripe; mellows beautifully when roasted; intensely aromatic |
| Persian Star | Purple Stripe | 8–12 | Complex, hot | 6b–7a | 6–8 months | Beautiful purple stripes on white; great flavor profile; medium heat; elegant appearance |
| Bogatyr | Purple Stripe | 9–13 | Very hot, spicy | 6b–7a | 7–9 months | Long storage; intense raw flavor; roasting transforms it completely; purple striped skin |
| Inchelium Red | Softneck | 15–20 | Mild, pleasant | 6b–7a only | 9–12 months | Best-tasting softneck; very large bulbs; excellent for braiding; Zone 7a performs best |
| Susanville | Softneck | 12–18 | Mild, sweet | 6b–7a only | 10–12 months | California softneck; large cloves; braids beautifully; not reliable in Zone 5 |
| California Early | Softneck | 12–20 | Very mild | 6b–7a only | 9–15 months | Standard commercial type; longest storage of any type; mild flavor for everyday use |
Why Hardneck Garlic Dominates in Pennsylvania
Pennsylvania’s cold winters are a massive advantage for growing hardneck garlic. Vernalization — exposure to sustained cold below 40°F for 4–8 weeks — is essential for hardneck varieties to split into properly formed cloves. Zone 5 winter temperatures exceed this requirement, which is why hardneck varieties produce larger, more flavorful bulbs in PA than in milder climates. Your PA winter is working directly in your favor.
Hardneck garlic produces 8–14 large cloves per bulb, with substantially more intense flavor than softneck — ranging from complex and rich (Rocambole) to hot and spicy (Purple Stripe) to hot and pungent (Porcelain). Softneck varieties produce 12–20 smaller, milder cloves and are grown primarily for longer storage and braiding capability.
In Zone 5 and much of Zone 6a, softneck varieties frequently fail to vernalize properly and produce soft, undivided bulbs rather than properly cloved heads. This is why Penn State Extension recommends hardneck varieties for cold zones — and why most experienced PA garlic growers don’t bother with softneck at all.
Cold winter = free vernalization. Your PA climate gives hardneck garlic a natural edge that gardeners in mild-winter states can’t replicate. This alone justifies choosing hardneck over softneck for Zones 5a–6a. Your winter is an asset, not a limitation.
Hardneck Subtypes Explained: Which One for Your Zone?
Not all hardnecks are equal. The three main subtypes — Rocambole, Porcelain, and Purple Stripe — have different flavor profiles, cold hardiness, and storage characteristics. Penn State Extension recognizes these distinctions, and experienced PA gardeners know which type works best in their region.
Rocambole hardnecks deliver the most complex flavor of any garlic type — rich, nuanced, excellent raw. They produce 8–12 large cloves per bulb. Storage is their weakness: 5–7 months maximum, significantly shorter than Porcelain. Varieties like German Red and Spanish Roja are ideal for Zones 6b–7a. In Zone 5, Rocambole’s delicate wrappers don’t hold up to freeze-thaw cycles and heavy mulch pressure as well as Porcelain types do.
Porcelain hardnecks are the cold-hardiness champions. They produce 4–6 large cloves per bulb with extremely tight papery wrappers that protect against moisture and freeze-thaw damage. Flavor is hot and pungent, not nuanced. Storage reaches 8–10 months. Music is the top-selling hardneck in the Northeast and thrives in Zone 5a; German White and Romanian Red are equally reliable. Porcelain is the safest choice for Zones 5a–5b.
Purple Stripe hardnecks occupy the middle ground: flavor complex like Rocambole (especially when roasted), cold hardiness stronger than Rocambole, storage 6–8 months. They produce 8–14 cloves per bulb. Bogatyr, Metechi, and Chesnok Red all perform well in PA zones 6a–7a. For roasting, Purple Stripe is exceptional — the heat mellows significantly when cooked, making it ideal for cooks who want deep garlic flavor without raw punch.
Zone 5 cold hardiness matters: Rocambole varieties are beautiful but risky in Zones 5a and 5b without exceptional mulching and site protection. Porcelain varieties like Music are proven performers through Scranton winters and mountain regions. Don’t gamble with delicate types in cold zones — stick with Porcelain until you’ve had a few successful seasons.
Scape Harvest: The Bonus Crop from Hardneck Garlic
Only hardneck garlic produces scapes — the curling green flower stalks that emerge in June. Softneck varieties do not produce scapes. Harvesting when the scape makes one full curl (early June in Zone 7a, mid-June in Zone 6a, late June in Zone 5) serves two purposes: you get a delicious bonus harvest, and removing scapes directs plant energy from flower production into bulb development, increasing final bulb size by 15–30%.
Scapes taste like a cross between garlic and green beans with a subtle sweetness. Excellent in stir-fries, pesto, roasted whole, pickled, or chopped into salads. They store 2–3 weeks refrigerated. One bed of 50 garlic plants yields enough scapes for several side dishes or a full batch of scape pesto. This bonus crop is unique to hardneck garlic — another reason hardneck dominates in PA.
Seed Garlic Sources: The Most Critical Decision
Your garlic success begins with certified disease-free seed garlic from reputable suppliers. Do NOT plant grocery store garlic. Store-bought garlic is often treated with growth inhibitors to prevent sprouting, may carry white rot or other soil-borne diseases, and the variety is unknown. Seed garlic companies sell certified virus-free clones tested for purity and disease — this investment pays dividends in reliable harvests year after year.
Reputable PA-friendly sources include Territorial Seeds, Johnny’s Selected Seeds, and Southern Exposure Seed Exchange, all specializing in Northeast-appropriate varieties. Local garlic festivals and farmers markets sometimes offer exceptional locally grown seed garlic — buy from growers who can tell you their vernalization and storage history. Buy early (August–September) before the best varieties sell out.
Seed garlic costs $0.40–$0.80 per clove ($3–$5 per bulb). Many PA gardeners save cloves from their own harvest to replant the next year — this works perfectly as long as plants stayed disease-free. New gardeners should start with certified seed garlic to avoid white rot and other diseases that persist in soil for years.
Clove Selection: Plant the Big Ones, Cook the Small Ones
When breaking apart a bulb for planting, cloves vary significantly in size. Plant only the largest cloves (about 1 inch or larger) — they contain more stored energy and produce larger harvest bulbs. Pea-sized and dime-sized inner cloves should be saved for cooking instead. This selection pressure, replanting only the largest cloves, is how you maintain and improve garlic quality year after year.
Over time, saving seed from your best-performing plants creates a locally-adapted, cold-hardy strain tailored to your specific PA zone. You’re essentially breeding your own Pennsylvania-optimized garlic — one that knows your soil, your drainage, and your winters. Three to five years of this selection produces noticeably superior results.
Seed saving tradition: Save the largest cloves from your best-performing plants every year. Over 3–5 growing seasons, this creates a locally-adapted strain tailored to your specific PA microclimate and soil conditions — a living heirloom that improves with each generation.
Season planning: Check our month-by-month Pennsylvania planting guide to keep your garden producing all year.
Frequently Asked Questions About Garlic Varieties in Pennsylvania
1. What is the best garlic variety for Pennsylvania?
For most of Pennsylvania, Music (Porcelain hardneck) is the safest choice — cold-hardy through Zone 5a, large storage bulbs, and proven across the Northeast for decades. For Zones 6b–7a where flavor is paramount, try German Red (Rocambole) or Chesnok Red (Purple Stripe) for more complex flavor profiles. Best practice: grow 3–4 varieties your first year and rotate them to spread risk and discover your personal favorites.
2. Can I grow softneck garlic in Pennsylvania winters?
Softneck varieties work in Zone 6b and 7a but struggle in Zones 5a–6a because they don’t vernalize properly in PA’s colder winters — they produce undivided bulbs rather than properly cloved heads. Zone 7a (Philadelphia area) is the reliable southern limit for softneck. In Zones 5–6a, hardneck is almost always the better choice for proper clove development and flavor.
3. Should I plant garlic from the grocery store in Pennsylvania?
No — grocery store garlic is often treated with growth inhibitors, disease history is unknown, and variety is not documented. Start with certified disease-free seed garlic from reputable suppliers. After one or two successful harvests of your own, you can save cloves for replanting without disease concerns. The initial investment in quality seed garlic pays off immediately in reliable germination and healthy plants.
4. What is the difference between hardneck and softneck garlic?
Hardneck produces a woody central stem (the scape) and 8–14 large, intensely flavorful cloves. It requires cold vernalization and stores 5–10 months depending on type. Softneck produces no scape, 12–20 smaller and milder cloves, doesn’t need vernalization, and stores 9–15 months. Hardneck is the correct choice for most PA zones; softneck is only reliable in Zone 6b–7a where winters are mild enough but not too cold.”
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5. When do I harvest garlic scapes in Pennsylvania?
Scapes emerge in late May or early June (earlier in Zone 7a, later in Zone 5a). Harvest when the scape has made one full curl — usually mid-June in Zone 6a, late June in Zone 5. Cut or snap cleanly at the base. Harvesting signals the plant to redirect energy from flower production to bulb development, increasing final bulb size by 15–30%. Don’t skip this step.
6. How long does garlic take to grow in Pennsylvania?
Garlic takes 9–10 months total: planted October–November, overwinters dormant under mulch, grows actively April–June, harvested July–August, then cured for 4–6 weeks before storage. The timeline is fixed by Pennsylvania’s seasons — you cannot rush it or grow garlic in spring as a spring-planted crop. This is one crop where patience is the entire strategy: plant it, mulch it, and mostly leave it alone until July.
Continue Reading: Garlic in Pennsylvania
- When to Plant Garlic in Pennsylvania — exact planting dates for your zone and why timing affects vernalization
- How to Grow Garlic in Pennsylvania — soil prep, mulching, scape harvest, curing, and storage for every zone
- Growing Vegetables in Pennsylvania — full PA vegetable hub
