Growing Garlic From Seed: A Beginner's Guide

Understanding Garlic Seeds and Starting From Seed

Most people grow garlic from cloves, but you can also grow garlic from seed. Garlic seed comes from the tiny bulbils found inside the flower head, called a scape or inflorescence. These round, pea-sized bulbils look different from the cloves you buy at the grocery store. When grown from seed, garlic takes longer to mature than clove propagation—typically two full years before reaching a harvestable bulb size. The first year produces a single round bulb called a "round," and the second year produces a divided bulb with multiple cloves.

Growing from seed has several advantages. Seeds are less expensive than buying cloves for large-scale growing. One garlic plant produces dozens of bulbils, making it an economical way to propagate garlic. Seeds are also easier to ship long distances and store for extended periods without sprouting. Additionally, starting from seed can help reduce disease transmission, particularly soil-borne pathogens that may contaminate cloves. However, seed-grown garlic requires patience and space, since you'll need to grow plants for two seasons before harvest.

Garlic varieties respond differently to seed production. Hardneck varieties, which produce visible scapes, are easier to harvest seeds from because the bulbils form above ground in a compact flower head. Softneck varieties produce bulbils as well, but they're enclosed within leafy bracts, making collection slightly more challenging. Some gardeners prefer hardneck varieties specifically for seed production due to the ease of identifying and harvesting mature bulbils.

Practical takeaway: Obtain garlic bulbils from mature garlic scapes in late spring or early summer. You can harvest your own if you're growing garlic, or purchase them from specialty seed companies. Plan for a two-year growing cycle and expect higher yields per initial investment compared to buying individual cloves.

Preparing and Starting Garlic Bulbils Indoors

Garlic bulbils benefit from a cold period before sprouting, mimicking their natural winter dormancy. This process, called stratification, improves germination rates significantly. To stratify bulbils indoors, place them in a moistened peat moss or sand mixture inside a sealed container. Store this in a refrigerator at temperatures between 35-40°F for 4-8 weeks. Check moisture levels weekly and mist if the medium becomes dry. This cold treatment encourages the bulbils to break dormancy and prepares them for germination.

After stratification, you can start bulbils indoors 6-8 weeks before your last spring frost date. Use seed trays filled with lightweight seed-starting mix—a blend of peat moss, vermiculite, and perlite works well. Plant bulbils about half an inch deep, spaced 1 inch apart in rows. Water gently after planting so the soil is moist but not waterlogged. Place trays in a warm location (65-75°F) under grow lights or near a sunny window. Garlic bulbils germinate slowly, sometimes taking 2-4 weeks to show sprouts. Maintain consistent moisture during this period.

Once seedlings emerge, they'll produce a single green shoot and shallow root system. Keep seedlings under lights for 12-14 hours daily, positioned 2-3 inches above the plants. Maintain soil temperature around 60-70°F. Water when the soil surface feels dry, but avoid waterlogging, which causes root rot. Seedlings develop slowly and may appear fragile initially. This is normal. After 6-8 weeks indoors, seedlings will be ready for transplanting outdoors, typically standing 3-4 inches tall with 1-2 true leaves.

Practical takeaway: Stratify bulbils for 4-8 weeks in the refrigerator before starting them indoors. Plant in seed-starting mix 6-8 weeks before your last frost date, maintain consistent moisture, and provide 12-14 hours of light daily. This extended indoor period creates strong seedlings ready for field conditions.

Transplanting Seedlings and First-Year Care

Garlic bulbil seedlings can be transplanted outdoors after all danger of frost has passed and they've developed 1-2 true leaves. Harden off seedlings first by gradually exposing them to outdoor conditions over 7-10 days. Start by placing them outside in shade for 2-3 hours, then gradually increase sun exposure and time outside. This acclimates plants to wind, lower humidity, and stronger light.

Choose a garden location with full sun (at least 6 hours daily, though 8+ hours is better) and well-draining soil rich in organic matter. Garlic prefers slightly acidic to neutral soil with a pH between 6.0-7.5. Work compost or aged manure into the soil before planting—garlic is a heavy feeder. Space seedlings 4-6 inches apart in rows spaced 12 inches apart. Plant at the same depth they were growing in trays, with the green shoot exposed above soil. Water gently after transplanting and keep soil consistently moist for the first two weeks while roots establish.

During the first growing season, seedlings develop a round, single-bulb structure with a shallow root system. This round bulb stores energy for next year's growth. Apply 1-2 inches of mulch around plants to retain moisture and suppress weeds. In early summer, as plants establish, reduce watering frequency but water deeply when the top inch of soil is dry. Provide balanced fertilizer (such as 5-10-10 NPK) monthly from June through August. Remove any flower scapes that appear—you want all energy directed toward bulb development, not flowering. By late summer, foliage will begin yellowing and dying back, signaling the end of the growing season.

Practical takeaway: Harden off seedlings over 7-10 days before planting outdoors after frost danger passes. Space plants 4-6 inches apart in full sun with well-draining, organic-rich soil. Remove scapes, mulch plants, and apply monthly fertilizer to support first-year bulb development.

Storing Rounds Over Winter and Second-Year Growth

After the first growing season, when foliage has completely dried and turned brown, harvest the rounds carefully by gently digging and lifting them from the soil. Handle them carefully to avoid bruising. Cure these rounds in a warm, dry location with good air circulation for 2-4 weeks. Spread them on screens or hang them in bundles in a shed, garage, or well-ventilated area at temperatures between 70-80°F. This curing process hardens the outer papery skin and prepares them for storage.

Once cured, store rounds in cool (35-45°F), dry conditions with relative humidity around 50-70%. A basement, root cellar, or unheated garage works well. Place them in mesh bags or wooden crates to allow air circulation. Check periodically and remove any that show mold or sprouting. Properly stored rounds remain viable through winter and into spring. Some gardeners store rounds in the refrigerator, though space limitations make this difficult for larger quantities.

In early spring, around the same time you'd plant garlic cloves, plant your stored rounds directly in the garden. Choose your growing location based on crop rotation—avoid areas where garlic, onions, or leeks grew the previous year. Prepare soil with compost or aged manure as before. Plant rounds pointed end up, 1-2 inches deep, spaced 4-6 inches apart. Rows should be 12 inches apart. Water after planting and maintain consistent moisture through spring. As temperatures warm and growth accelerates, the single round bulb divides into multiple cloves. This second year of growth produces a fully divided, mature garlic bulb ready for harvest.

Practical takeaway: Cure first-year rounds for 2-4 weeks after harvest, then store in cool (35-45°F), dry conditions over winter. Plant rounds again in early spring, spacing them 4-6 inches apart. During the second growing season, the round will naturally divide into a mature multi-clove bulb.

Second-Year Maintenance and Managing Nutrients

During the second year, plants emerge from rounds and grow rapidly as