Garlic in Zone 8B — Pacific Northwest

Growing garlic in the Pacific Northwest is one of the most rewarding garden investments you can make. Our mild summers and long growing season create ideal conditions for developing those complex, pungent flavors that make homegrown garlic incomparable to store-bought bulbs. With cool nights that enhance flavor development and our region's naturally fertile soils, you'll harvest bulbs with exceptional taste and storage quality.

While our wet springs and cool soil temperatures can challenge some crops, garlic actually thrives in these conditions. The key is working with our 210-day growing season and understanding that garlic needs that long, slow development through our mild climate. Once you get the timing right, garlic becomes one of the most reliable crops in your Pacific Northwest garden.

Wait, there's been a mix-up in the planting information provided. Garlic isn't typically transplanted in late June through mid-July in the Pacific Northwest - that's actually when you'd harvest it! Garlic is planted in fall (mid-October through early November) and harvested the following summer.

For proper garlic growing in our region, you'll plant individual cloves directly in the soil during our fall planting window. Choose a sunny spot with well-draining soil, as our wet winter months can cause bulbs to rot in soggy conditions. Plant cloves pointed end up, about 2 inches deep and 4-6 inches apart.

The cool, moist conditions of our Pacific Northwest fall and winter are exactly what garlic needs for proper root development and vernalization. This cold period is essential for bulb formation the following year.

Garlic has moderate water needs that align well with our Pacific Northwest rainfall patterns. During the active growing season from late winter through early summer, maintain consistent soil moisture but never let it become waterlogged - especially important given our naturally wet springs.

Check soil moisture using the finger test, pushing down about 2 inches. During our dry summer months, you'll need to provide about 1 inch of water per week as the bulbs finish developing. Water at the base of plants rather than overhead to prevent fungal issues, which can be problematic in our humid spring conditions.

The most crucial timing is knowing when to stop watering. About 2-3 weeks before harvest (typically early to mid-June in our region), cease all watering when you notice the lower leaves starting to brown. This allows the bulbs to cure naturally in the ground and prevents rot during storage.

A thin layer of straw mulch helps retain moisture during our drier summer periods while keeping weeds down, but avoid thick mulching in winter when excess moisture retention could cause problems in our wet climate.

Garlic requires minimal pruning, but there's one important task for hardneck varieties grown in our region. In late spring, usually May, you'll notice curly flower stalks called scapes emerging from the center of each plant. Cut these off when they make one or two curls - this redirects the plant's energy back into bulb development rather than flower production.

Don't throw those scapes away! They're a delicious early garlic harvest with a milder flavor perfect for stir-fries, pesto, or grilling. This gives you two harvests from each plant - the scapes in late spring and the bulbs in summer.

Leave all the foliage intact throughout the growing season, as these leaves are working to build energy for the developing bulb below. Only remove leaves if they're clearly diseased or damaged. As our mild fall approaches and you near harvest time, the lower leaves will naturally begin browning - this is your signal that harvest is approaching.

Your garlic will be ready for harvest in late February through early April - quite early compared to other regions, thanks to our mild climate and the long growing season that began with fall planting. The key indicator is when the lower third of leaves have turned brown while the upper leaves remain green.

Don't wait too long to harvest, as over-mature bulbs may split their papery wrappers and won't store well. Carefully dig bulbs with a fork or spade, brushing off excess soil but leaving the roots and stems attached for now. Handle gently to avoid bruising.

Cure your garlic in a dry, well-ventilated area for 2-4 weeks. Our mild summers are perfect for this - you can hang bunches in a garage, shed, or covered porch where they'll get good air circulation. Once properly cured, the outer skins will be papery and dry, and you can trim the roots and cut stems to about an inch above the bulb for storage.

With first frost not arriving until early November, you have plenty of time to use fresh garlic and plan for fall planting of your next crop. Save your best bulbs for replanting in mid-October through early November.

White Rot White rot appears as yellowing and wilting leaves, often starting from the base of the plant. You'll notice white, fluffy fungal growth around the bulb area at soil level, and the bulb itself becomes soft and rotten with a strong odor. Our cool, moist spring conditions can encourage this soil-borne fungus, especially in heavy clay soils with poor drainage.

This fungus persists in soil for years, so prevention is key. Improve drainage by adding organic matter, rotate garlic to different beds every few years, and avoid overwatering during our naturally wet spring months. Once white rot appears, remove affected plants immediately and don't compost them.

Rust Rust shows up as rusty orange, yellow, or brown pustules on leaves and stems, mostly on the undersides. Leaves yellow and drop prematurely, reducing bulb size. Various rust fungi spread through wind-borne spores and thrive in our humid spring conditions when moisture sits on leaves from morning dew or rain.

Remove affected leaves promptly and avoid overhead watering during our wet spring months. Improve air circulation by proper spacing and avoiding working among plants when they're wet from our frequent spring rains. Sulfur or copper fungicides can help if applied early, but good cultural practices are your best defense.

Bulb Mites These tiny pests attack bulbs both in the ground and during storage, causing soft, rotting areas that may have a chalky white appearance. You might notice stunted growth or yellowing plants above ground. Our mild, moist conditions can encourage mite problems, especially in stored bulbs.

Inspect bulbs carefully at harvest and cure them properly in our dry summer air. Store only firm, well-cured bulbs and check stored garlic regularly. Proper crop rotation and avoiding planting in areas where onion family crops have had mite problems helps prevent infestations.

Pacific Northwest Specific Challenges: Our region's wet springs and mild summers create perfect conditions for fungal diseases, while our generally dry summer air helps with curing and storage. The key is managing moisture during the wet season while taking advantage of our excellent curing weather in summer.

Garlic makes an excellent companion throughout your Pacific Northwest garden. Plant it near tomatoes and peppers - the garlic's natural sulfur compounds help deter many common pests that attack these warm-season crops, while the garlic harvest timing (late February through early April) happens well before these heat-lovers need the space. Brassicas like cabbage, broccoli, and kale also benefit from garlic's pest-deterrent properties, and their growing seasons align well with our region's cool-season gardening strengths.

Avoid planting garlic near beans and peas, as garlic can inhibit the nitrogen-fixing bacteria that these legumes depend on. This is especially important in our Pacific Northwest gardens where we rely heavily on cool-season legumes during our mild springs and falls. Roses make surprisingly good companions for garlic - many PNW gardeners plant garlic around rose beds to help deter aphids and other pests while adding structure to the garden during winter months when roses are dormant.