Garlic (Allium sativum) is one of the highest-value crops per square meter you can grow, often two to five times more profitable than onions on the same surface area. It stores for months without refrigeration, has strong culinary and medicinal demand, and requires no complex machinery to plant or harvest. This guide walks through everything you need to grow garlic successfully in 2026, whether you are a home gardener in the United States, a smallholder in Kenya, or a commercial grower anywhere in between.
1. Two types of garlic, pick the right one
The first fork in the road is the choice between hardneck and softneck garlic.
Hardneck garlic (Allium sativum var. ophioscorodon)
- Produces a rigid central flowering stalk called a scape.
- Larger, easier-to-peel cloves, typically 6 to 10 per bulb.
- Stronger, more complex flavor.
- Requires a cold winter (vernalization). Suited to temperate climates: US zones 3–7, most of Europe, highlands of East and Central Africa.
- Storage life: 4 to 6 months.
- Popular varieties: Rocambole, Purple Stripe, Porcelain, Music.
Softneck garlic (Allium sativum var. sativum)
- No scape, flexible neck, ideal for braiding.
- Smaller cloves, more per bulb (10 to 20).
- Milder flavor.
- Adapts to warmer climates: US zones 8–10, Mediterranean, tropical highlands, sub-Saharan African lowlands with a cool season.
- Storage life: 6 to 12 months.
- Popular varieties: California Early, California Late, Silverskin, Artichoke.
If you are in a tropical or subtropical climate without a real winter, softneck varieties are the safer choice. In highland regions (above 1,500 m) hardneck can succeed.
2. When to plant garlic
Temperate climate
- Fall planting (recommended): 4 to 6 weeks before the ground freezes. In the northern US and northern Europe, this means mid-October to mid-November. This is when garlic performs best.
- Spring planting (backup only): as soon as the soil can be worked, typically February to March. Yields will be significantly smaller.
Subtropical and tropical climate
- Plant during the coolest part of the year. In sub-Saharan Africa this means the cool dry season, roughly November to January depending on the region.
- Softneck varieties are strongly preferred; they do not require a hard frost period.
- Highland regions (above 1,500 m) can grow both types year-round with irrigation.
3. Prepare the soil
- Soil type: sandy loam or loam, well-drained. Garlic rots in waterlogged soil.
- pH: 6.0 to 7.0.
- Fertility: garlic is a heavy feeder. Work in 4 to 6 cm (2 inches) of well-rotted compost or aged manure before planting.
- Depth: loosen the soil to at least 20 cm.
- Rotation: do not plant garlic where onions, leeks or shallots have grown in the last 2 to 3 years, they share diseases.
4. Break the bulb and select your cloves
- Wait until just before planting to break the bulb apart. Cloves left loose lose vigor rapidly.
- Plant only the largest, firmest cloves. Cloves smaller than a fingernail produce small bulbs.
- Save small cloves for cooking, not planting.
- Do not peel the cloves. The papery skin protects them from soil pathogens.
Where to source planting cloves
Do not plant supermarket garlic, most is treated with sprout inhibitors, and many imported bulbs carry viruses. Buy certified seed garlic from a reputable grower or agricultural cooperative. For commercial production, seed garlic represents 30 to 50 % of variable costs, it is worth investing in quality.
5. Planting technique
- Spacing: 10 to 15 cm between cloves within the row, 25 to 30 cm between rows.
- Density: approximately 20 to 30 cloves per m², or 200,000 to 300,000 cloves per hectare.
- Depth: 5 cm in temperate climates (deeper for winter protection), 3 cm in warmer climates.
- Orientation: pointed end up, flat root end down. Planting upside down produces deformed bulbs.
- Water lightly after planting.
- Mulch: apply 8 to 15 cm of straw or leaves in temperate zones to insulate against freeze-thaw cycles. In warmer climates, use a lighter mulch to conserve moisture.
6. Ongoing care
Watering
Garlic needs about 25 mm of water per week during active growth in spring. Reduce watering as leaves start to yellow (about 3 weeks before harvest),this improves flavor concentration and storage.
Fertilization
- Early spring (when shoots emerge): apply nitrogen, either an organic source (blood meal, feather meal) or a balanced NPK such as 10-10-10 at 200 to 300 kg per hectare.
- Mid-spring: repeat lightly if leaves show pale color.
- Stop feeding once bulbs begin to swell (typically late April to early May in temperate climates). Late nitrogen delays maturity and reduces storage life.
Weeding
Garlic competes poorly with weeds. Hand-weed regularly, especially in the first 8 weeks. Mulch reduces the workload significantly.
Scape removal (hardneck only)
When hardneck garlic sends up its scape (usually 3 to 4 weeks before harvest), cut it off when it forms one full loop. This diverts energy into the bulb and can increase bulb size by 25 to 30 %. Bonus: garlic scapes are edible and sell well at farmers markets.
Pests and diseases
- White rot (Sclerotium cepivorum): the most serious garlic disease. Once in the soil, it persists for 20+ years. Prevention: strict rotation, clean seed stock, well-drained soil.
- Onion maggot, thrips: monitor and treat if pressure is high.
- Rust (Puccinia allii): more common in warm humid conditions. Improve air circulation, avoid overhead watering.
7. Harvest
- Timing: harvest when the lower 3 to 5 leaves have turned brown but 4 to 6 upper leaves are still green. This is critical: too early = small bulbs; too late = cloves split and store poorly.
- Duration from planting: 8 to 9 months for fall-planted garlic (October to July), 4 to 5 months for spring-planted.
- Loosen the soil gently with a fork; do not pull the plants (necks break easily).
- Harvest on a dry day, never right after rain.
8. Curing and storage
- Curing: hang bulbs in bundles of 6 to 10 in a warm, dry, shaded, well-ventilated space for 3 to 4 weeks.
- Trimming: after curing, trim roots to 1 cm and cut the stem to 2 to 3 cm above the bulb (softneck) or 10 cm (hardneck, for braiding).
- Storage conditions: 0 °C or 15–18 °C,never between these (5–13 °C triggers sprouting). Humidity 50 to 60 %.
- Storage life: 4 to 6 months for hardneck, 6 to 12 months for softneck under proper conditions.
9. Yield and profitability
- Home garden: 200 to 400 g per m², enough to supply a household for the year.
- Commercial: 6 to 12 tonnes per hectare in temperate climate on well-managed farms.
- Value: fresh garlic wholesale ranges widely by country and season. Farmers who bypass wholesalers and sell direct (farmers markets, specialty grocers, restaurants) capture significantly more margin.
Garlic is often called « the beginner’s cash crop » because of its low input cost, storage tolerance and reliable market demand. For commercial-scale projects, especially in African highland regions where garlic quality can be exceptional, our team of agricultural consulting and engineering and turnkey agricultural projects supports feasibility studies, planning and setup.
Article by the Jogoo Agriculture agronomy team. Recommendations should be adapted to your climate, variety and locally registered inputs.
Frequently asked questions
When is the best time to plant garlic?
In temperate climates, the best time to plant garlic is 4 to 6 weeks before the ground freezes, typically mid-October to mid-November in the northern US and northern Europe. Fall planting gives significantly bigger bulbs than spring planting. In subtropical and tropical climates, plant during the coolest part of the year, November to January in sub-Saharan Africa.
How deep should you plant garlic?
Plant garlic cloves 5 cm deep in temperate climates (deeper protects from freeze-thaw), or 3 cm deep in warmer climates. Orient the pointed end up and the flat root end down, planting upside down produces deformed bulbs. Space cloves 10 to 15 cm apart within rows and 25 to 30 cm between rows.
Can you plant garlic from the grocery store?
It is not recommended to plant supermarket garlic. Most is treated with sprout inhibitors, and many imported bulbs carry viruses. Buy certified seed garlic from a reputable grower or agricultural cooperative. Seed garlic represents 30 to 50 % of variable costs for commercial production, it is worth investing in quality.
How long does garlic take to grow?
Fall-planted garlic takes 8 to 9 months from planting to harvest (October to July in temperate climates). Spring-planted garlic matures in 4 to 5 months but produces significantly smaller bulbs. In tropical climates with softneck varieties, count on 5 to 7 months.
How do you know when garlic is ready to harvest?
Harvest garlic when the lower 3 to 5 leaves have turned brown but 4 to 6 upper leaves are still green. This is critical: too early gives small bulbs, too late causes cloves to split and reduces storage life. Loosen the soil gently with a fork rather than pulling the plants, necks break easily. Harvest on a dry day.