Garlic in Zone 7B — Pacific Northwest

Garlic is one of the most rewarding crops you can grow in the Pacific Northwest, where our mild summers and long growing season create perfect conditions for developing complex, robust flavors. Unlike store-bought garlic that's often been treated to prevent sprouting, homegrown bulbs offer incredible variety and taste that shines in everything from roasted vegetables to herb butter. Our cool nights during the dry summer months actually enhance flavor development, giving you garlic with deeper, more nuanced taste than what you'd find in hotter climates.

While our 240-day growing cycle from planting to harvest might seem daunting, Zone 7B's 193-day growing season works beautifully for garlic production. The key challenge in the Pacific Northwest is managing our wet springs and the transition from cool, overcast spring days to our dry summer months. With proper timing and variety selection, you'll find garlic surprisingly easy to grow here, especially since our mild climate means fewer pest pressures than gardeners face in other regions.

Garlic grows best when direct-sown rather than transplanted, as the bulbs prefer to establish their root systems without disturbance. However, if you're working with pre-started plants or dividing existing clumps, transplant during early to late July when soil temperatures have warmed but before the intense dry period of late summer.

Spend about a week hardening off any transplants by gradually increasing their outdoor exposure, starting with a few hours of morning sun and building up to full day exposure. Space your garlic cloves 4-6 inches apart in rows, giving them room to develop into full bulbs without competing for nutrients.

During transplanting time in the Pacific Northwest, you'll often be working with dry, warm soil that's perfect for garlic establishment. Water transplants thoroughly at planting and keep the soil consistently moist for the first few weeks while roots establish, then transition to your regular watering schedule as the plants adapt to your garden conditions.

Garlic needs consistent but not excessive water throughout its growing cycle, with timing being crucial in our Pacific Northwest climate. During our wet spring months, you'll likely need minimal supplemental watering as natural rainfall handles most of the plant's needs. Once our dry summer period begins, typically in late June or early July, you'll need to provide about 1 inch of water per week.

Use the finger test to check soil moisture—stick your finger 2 inches deep into the soil near the base of the plants. If it feels dry at that depth, it's time to water. Water at the base of plants rather than overhead to prevent fungal issues, though our dry summer humidity makes this less critical than in more humid regions. Deep, less frequent watering encourages better bulb development than light, daily applications.

Stop watering 2-3 weeks before harvest when the lower leaves begin browning—this allows the bulbs to cure properly in the ground and prevents rot. In the Pacific Northwest, this usually means cutting back water in mid to late February, depending on your harvest timing. Our spring rains can complicate this, so be prepared to create drainage or cover plants if we get unexpected heavy rain during the curing period.

A thin layer of straw mulch helps retain moisture during our dry summers and keeps soil temperatures moderate. Watch for signs of overwatering like yellowing leaves or soft neck areas, and underwatering like stunted growth or premature leaf die-back.

Garlic requires minimal pruning, but hardneck varieties will send up curly flower stalks called scapes in late spring or early summer. Cut these scapes when they begin to curl but before they flower, typically when they've made one or two full loops. This redirects the plant's energy into bulb development rather than flower and seed production.

The scapes themselves are a delicious bonus crop—they taste like mild garlic and work wonderfully in stir-fries, pesto, or grilled as a side dish. Remove them with clean scissors or pruning shears, cutting close to where the scape emerges from the main stem.

Leave the foliage intact throughout the growing season, as the leaves produce energy for bulb development. Only remove leaves that have completely yellowed or died back naturally. As your first frost approaches in late October, any remaining green foliage will naturally die back, signaling that your garlic is ready for harvest or final curing.

Your garlic will be ready for harvest during early March through mid-April, after completing its full 240-day growing cycle. The timing depends on when you planted and which variety you're growing, with hardneck types typically ready slightly earlier than softneck varieties. Watch for the telltale sign of readiness: when the lower third of leaves have turned brown but the upper leaves remain green.

Don't wait until all leaves have died back, as this can lead to bulbs that split or don't store well. Carefully dig bulbs with a garden fork rather than pulling them, as the stems can break off easily when the soil is dry. Brush off excess soil but don't wash the bulbs—you want them to cure with some protective soil still clinging to the roots.

After harvesting, cure your garlic in a dry, well-ventilated area for 2-4 weeks. Our mild Pacific Northwest conditions are excellent for curing, though you may need to provide protection from late spring rains. Properly cured garlic should have papery outer skins and feel firm when gently squeezed.

Once cured, trim roots and cut stems to about 1 inch above the bulb for storage, or leave stems long if you want to braid softneck varieties. Well-cured garlic from the Pacific Northwest often stores 6-10 months when kept in a cool, dry place with good air circulation.

White Rot White rot appears as yellowing and wilting leaves, often starting with older outer leaves first. When you dig up affected plants, you'll find white, fluffy fungal growth around the base of the bulb and roots, along with small black sclerotia (resting structures) that look like poppy seeds. This soil-borne fungus thrives in cool, moist conditions—exactly what we get during Pacific Northwest springs. Remove affected plants immediately and don't compost them. Avoid planting garlic or other alliums in the same spot for at least 5-7 years, as the sclerotia can survive in soil for decades.

Rust Rust shows up as rusty orange, yellow, or brown pustules on leaves and stems, mostly on the undersides of foliage. Leaves yellow and drop prematurely, reducing bulb size and quality. Various rust fungi spread via wind-borne spores and are favored by warm, humid conditions with moisture on leaves—though our dry summer humidity helps reduce severity compared to more humid regions. Remove affected leaves promptly and avoid overhead watering. Improve air circulation by proper spacing and don't work among wet plants during our dewy mornings.

Bulb Mites These tiny white mites attack garlic bulbs both in the ground and during storage, creating soft, rotted areas that often allow secondary bacterial infections to take hold. You might notice plants failing to thrive or bulbs that feel soft when harvested. Bulb mites are particularly problematic in storage areas that are too warm or humid. Ensure proper curing and store bulbs in cool, dry conditions with good air circulation. Remove any soft or damaged bulbs immediately to prevent spread to healthy ones.

Pacific Northwest Specific Challenges: Our region's combination of wet springs followed by dry summers creates unique challenges for garlic. The extended wet period can promote fungal diseases like white rot and rust, while our cool spring soil temperatures can slow early growth. However, our mild summer heat and dry conditions during bulb maturation actually work in our favor, reducing many pest pressures and creating ideal curing conditions that gardeners in more humid regions envy.

Garlic makes an excellent companion plant in the Pacific Northwest garden, particularly with tomatoes and peppers during our short warm season. The garlic's sulfur compounds help repel aphids and other soft-bodied insects that can plague these heat-loving crops, while the garlic's upright growth habit doesn't compete for space with sprawling tomato or pepper plants. Plant garlic around the perimeter of tomato beds or intersperse it among pepper plants for natural pest protection.

Brassicas like cabbage, broccoli, and kale also benefit from garlic's pest-repelling properties, especially against cabbage worms and aphids that thrive during our cool, overcast spring days. Roses planted near garlic often show improved health and reduced aphid pressure. Avoid planting garlic near beans and peas, as garlic can inhibit nitrogen fixation in legume roots, reducing their productivity—something particularly important in our region where we rely on these cool-season crops for extended harvests through our mild falls.