Garlic in Zone 7A — Pacific Northwest

Growing garlic in the Pacific Northwest is one of those perfect matches that makes you wonder why everyone doesn't do it. Our mild summers and long growing seasons create ideal conditions for developing those complex, pungent flavors that make store-bought garlic taste flat by comparison. You'll get dense, well-formed bulbs that store beautifully through our wet winters, and there's something deeply satisfying about harvesting your own garlic just as the spring garden hits its stride.

While our cool springs can slow early growth and those notorious Pacific Northwest slugs eye your emerging shoots, garlic is remarkably forgiving once you understand the timing. With our 183-day growing season, you have plenty of time for bulbs to develop properly, and garlic's natural hardiness means it shrugs off our temperature swings and wet weather better than most crops.

Wait, there's some confusion here - garlic isn't typically transplanted from seedlings! You plant garlic cloves directly in fall for harvest the following summer. The best planting window in the Pacific Northwest runs from mid-October through mid-November, when soil temperatures have cooled but before the ground freezes.

Plant individual cloves pointed-end up, 4-6 inches apart and about 2 inches deep in well-draining soil. Choose a sunny spot that won't get waterlogged during our wet winter months. The cloves need that cold period to develop properly - it's called vernalization, and our Pacific Northwest winters provide exactly what they need.

If you're working with purchased cloves, plant them within a week of breaking apart the bulb. Each clove will grow into a full bulb by next summer, making this one of the most rewarding fall plantings you can make in our region.

Garlic's watering needs shift dramatically through the seasons, and understanding this rhythm is crucial for success in the Pacific Northwest. During fall and winter, our natural rainfall usually provides plenty of moisture - you'll rarely need to water at all unless we hit an unusually dry spell.

Come spring, as the soil warms and shoots emerge, you'll want to provide consistent moisture. Check soil moisture by sticking your finger 2 inches down - it should feel like a wrung-out sponge. During active growth from late winter through early summer, aim for about 1 inch of water per week, including rainfall. Water at the base of plants rather than overhead to keep our dry summer air moving freely around the foliage.

Here's the critical timing: stop watering completely when the lower third of leaves start turning brown, typically in mid to late June. This allows the bulbs to cure naturally in the ground and prevents rot. Signs of overwatering include yellowing leaves and soft spots at the base, while underwatered garlic shows stunted growth and prematurely dried leaf tips.

A light mulch of straw or shredded leaves helps maintain consistent soil moisture during spring growth and keeps weeds down, but pull it back once you stop watering to allow proper curing.

Garlic requires minimal pruning, but there's one important task for hardneck varieties: cutting the scapes. These curly flower stalks emerge in late spring or early summer and should be removed when they make one full curl. Snip them off where they emerge from the plant - this redirects the plant's energy into bulb development rather than flower production.

Those scapes aren't waste - they're a delicious bonus harvest with a mild garlic flavor perfect for stir-fries, pestos, or grilling. Many Pacific Northwest gardeners consider scape season one of the highlights of the garlic growing year.

As your garlic approaches harvest time in mid-summer, resist the urge to cut back the foliage. Those leaves are still feeding the developing bulbs. Only remove leaves that are completely brown and dead, leaving healthy green growth until harvest. After our first fall frost in mid-October, any remaining foliage will naturally die back if you're growing a second-year crop.

Your garlic will be ready for harvest from mid-July through early August, about 240 days after fall planting. The key indicator is leaf color: harvest when the lower third of leaves have turned brown but the upper leaves remain green. This timing ensures bulbs are fully developed but haven't started to separate or deteriorate in the ground.

Test-dig one bulb to check development before harvesting the entire crop. Mature bulbs should fill out their papery skin completely and feel firm. Use a garden fork to gently lift bulbs, brushing off excess soil but leaving the roots and tops intact for now.

Our dry Pacific Northwest summers are perfect for curing garlic. Hang bundles or lay bulbs on screens in a well-ventilated, shaded area for 2-4 weeks until the outer skins are papery and the necks feel completely dry. Once cured, trim roots and cut stems to about an inch above the bulb for storage.

Don't wait too long to harvest - bulbs left in warming soil can split or begin sprouting. If you miss the window and find some splitting, use those bulbs first as they won't store as long as properly harvested ones.

White Rot White rot appears as yellowing leaves and a white, fluffy fungal growth at the base of bulbs, often accompanied by small black sclerotia (seed-like structures). This soil-borne fungus thrives in our cool, moist spring conditions and can persist in soil for years. Remove affected plants immediately, including surrounding soil, and don't compost them. Improve drainage and avoid planting garlic or onions in affected areas for at least four years. Solarizing soil during summer can help reduce fungal populations.

Rust Rust shows up as rusty orange, yellow, or brown pustules on leaves and stems, mostly on the undersides, followed by yellowing and premature leaf drop. Various rust fungi spread through wind-borne spores and love our mild, humid spring conditions, especially when leaves stay wet from morning dew or rain. Remove affected leaves immediately, avoid overhead watering, and improve air circulation around plants. Apply sulfur or copper fungicide if problems persist, and never work among wet plants to prevent spreading spores.

Bulb Mites These tiny white mites feed inside garlic bulbs, causing them to become soft, discolored, and eventually rot. You'll often discover them when you dig bulbs that feel unusually soft or find damaged cloves during storage. Bulb mites are often introduced through infected planting stock and thrive in our moist soil conditions. Plant only certified, healthy cloves, rotate crops, and remove any soft or damaged bulbs immediately. Good drainage and proper curing help prevent infestations.

Pacific Northwest Specific Challenges Our region's wet springs can exacerbate fungal problems, while cool soil temperatures may slow early growth compared to warmer climates. However, our mild summers rarely stress garlic with excessive heat, and our dry summer conditions actually help with the crucial curing process. The key is managing moisture carefully - embracing our wet winters but ensuring good drainage to prevent waterlogged conditions that encourage disease.

Garlic makes an excellent companion throughout the Pacific Northwest garden, particularly with tomatoes, peppers, and brassicas like cabbage and broccoli. Its strong scent helps deter aphids, spider mites, and cabbage worms - common pests in our region. Plant garlic around the perimeter of tomato beds or intersperse it with pepper plants, where it may also help prevent some fungal diseases that thrive in our humid spring conditions.

Avoid planting garlic near beans and peas, as it can inhibit their growth and nitrogen fixation. Since garlic stays in the ground from fall through summer, plan your companion plantings around this long timeline - spring brassicas work perfectly as they'll be harvested before garlic needs its curing period. Many Pacific Northwest gardeners also plant garlic near roses, where it helps deter aphids and other pests while taking advantage of the well-draining, sunny conditions both plants prefer.