Vegetable · Fabaceae
Fava Bean
Vicia faba
Drive them into cold spring soil, give them sun and steady water, and these tough broad beans crop early while the weather still runs cool.
Full sun
Every 5–7 days
75–90 days
USDA 3–8
Overview
Fava beans rank among the oldest crops people have ever grown, a cool-season legume that laughs off cold the way few vegetables can. They shoot up tall and upright on a sturdy, squarish stem, carrying their flowers and fat pods snug against that strong frame. Gardeners call them broad beans too, a name the wide, flat seeds inside each soft-lined pod earn outright.
Here is the trait that makes favas a thrill to grow: they crave the cold. Get them in while most beans are still weeks from the bed, either in early spring the second the ground turns over or in fall where winters stay mild. Better yet, this nitrogen-fixing legume feeds itself and hands the next crop a richer patch of soil to work with.
They ask almost nothing and pay off early. Set them in good ground, hold the soil evenly moist through bloom and pod fill, and keep watch on the new tips for black aphids. Time the sowing so flowering hits cool weather, and you will be pulling tender pods and beans off the plant from late spring into early summer.
Care
The short version: give them full sun and cool weather, deep well-drained soil loaded with organic matter, and steady moisture through flowering and pod fill, and skip most feeding since this plant fixes its own nitrogen.
Light
Favas hit their stride in full sun, though they will take a little partial shade and still set pods. Pour on the light and the tall stems stand firm while the flowering goes heavy.
Water
Keep the soil evenly moist through germination, flowering, and pod fill, which usually means a deep soak every 5 to 7 days. Don't let it lurch between bone dry and soggy, and ease off in cold, wet soils, where waterlogging rots the seed.
Soil
Get them into deep, well-drained loam packed with organic matter. A pH from 6.0 to 7.5 suits them, and that deep, free-draining ground gives the strong taproot room to dive.
Temperature
This is a true cool-season crop, hardy down to about 14°F (-10°C) and at its happiest below 77°F (25°C). Heat at flowering is the enemy, since it knocks the blossoms off before they can set pods.
Humidity
Ordinary outdoor air around 40% to 60% does the job, so there's no number to chase. Airflow counts far more, because crowded, damp leaves throw the door open to chocolate spot.
Feeding
As a nitrogen-fixing legume, the fava feeds itself and rarely wants extra nitrogen. On poor ground, work in a little phosphorus and potassium at planting and let the plant take it from there.
Pruning
Once the lowest pods set, pinch out the soft growing tips. That one quick move strips black bean aphids of the tender shoots they crave and drives the plant's energy down into filling the pods.
Size & spacing
Plants shoot up 3 to 5 feet (90 to 150 cm) tall while holding a slim 12 to 18 inches (30 to 45 cm) across. Give each one that room so air rips through and chocolate spot gets no easy grip.
When to plant
Favas turn the cold that stalls most beans into their own head start. Sow them straight into the ground in early spring the moment the soil works, or in fall where winters stay mild, then pull tender pods from late spring into early summer before the heat calls time on the plant.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Direct-sow in early spring as soon as soil is workable, or sow in fall in mild-winter (zone 7+) climates for overwintering.
- Harvest: Harvest tender pods/seeds in late spring to early summer.
Hardiness
USDA hardiness zones: 3–8
Temperature: down to -40°C
Troubleshooting
Most fava trouble breaks out on the new growth up top or on the lower leaves once the weather turns damp. Pounce on the early signs and a small problem stays small. Match what you spot below, then move while it still does some good.
Reddish-brown spots racing across the leaves in wet weather
Those rusty blotches creeping over the foliage signal chocolate spot, a fungus that surges in cool, soggy, crowded plantings and can blacken whole leaves once it gets rolling. Fight back by opening the spacing wide for airflow, stripping off the worst-hit leaves, and keeping water clear of the canopy. Nail the drainage and go light on nitrogen, and you will drive it right back.
Fix:
- Improve air circulation by wider spacing
- Remove and destroy badly affected foliage
- Avoid overhead watering
Black aphids piling onto the fresh new tips
Spot a dark crowd massing at the top of the plant and you have found black bean aphids, which charge straight for the softest new growth. Ants come to farm them, and the sticky honeydew they leave soon turns sooty. Snap off the worst tips, drive the rest off with a hard jet of water, and bring in insecticidal soap only when a stubborn colony digs in.
Fix:
- Pinch off and destroy heavily infested growing tips
- Dislodge colonies with a strong water spray
- Use insecticidal soap on persistent infestations
Flowers tumbling off before any pods set
When a plant powers along, lush and green, but keeps dropping its blossoms before pods form, heat during flowering is almost always behind it. Favas crop in the cool and bail on their flowers the moment a hot spell crashes the party at bloom time. Hold the soil evenly moist right through flowering, grab every pod that does set, and next season slide the sowing date so the flowers open in cool weather.
Fix:
- Maintain even soil moisture during bloom
- Harvest existing pods promptly to encourage continued set
Toxicity
Grow fava beans with a clear conscience around cats, dogs, horses, rabbits, livestock, and poultry, since the plant is a food crop and safe for them all. For people, cooked beans are wholesome and nourishing, with one important exception: anyone with the inherited G6PD enzyme deficiency can suffer a serious blood reaction called favism from eating the beans or even breathing the pollen, so they should avoid the plant entirely.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Fava plants pose zero poisoning risk to cats, so let a curious one nose in and nibble a leaf or pod without a second thought.
Dogs None
Dogs roam happily among the plants, and the ASPCA keeps favas off its toxic list. Even a big mouthful of raw beans tends to pass as nothing worse than a bit of gas or a loose stool.
Horses Safe
Horses tuck into fava foliage with no trouble at all, and that very appetite is how the old name horse bean came to stick.
Rabbits Safe
Rabbits browse the leaves and tender pods without harm, so go ahead and share, just ease them onto any new green slowly, as with all fresh forage.
Livestock Safe
Cattle, goats, and sheep chow down on fava beans as a feed and fodder crop, so the plant brings no real danger out in the field.
Birds Safe
Backyard poultry peck at the beans and greens safely, and some growers raise favas on purpose as a bird feed.
People Safe
Cooked fava beans make wholesome, satisfying food for most people. The one real exception is anyone carrying the inherited G6PD enzyme deficiency, who can suffer a serious blood reaction called favism from eating the beans or even breathing the pollen, so that person must steer clear of the plant entirely.
Human food-safety note: people with the inherited enzyme deficiency G6PD (favism) can develop acute hemolytic anemia from eating fava beans or even inhaling the pollen. This is a human genetic-condition concern, not a pet toxicity or general toxicity issue.
Varieties
Loads of fava bean varieties are out there, but a standout few keep earning their spot in home gardens. Get to know these by name.
Aquadulce
A tough long-pod type gardeners grab for autumn sowing, since it powers through winter to overwinter in mild climates.
Windsor
The classic broad, flat-seeded bean packed into short pods, grown first and foremost for the big, rich flavor it delivers.
The Sutton
A compact dwarf that caps out around 12 inches (30 cm), making it a winner for small beds and windy, exposed sites.
Companions
Fava beans pair well with hungry crops that draw on the nitrogen they leave behind, and sit poorly next to onions and garlic, which many gardeners find hold legumes back.
Plant near
brassicas: As a nitrogen-fixing legume, fava beans can precede or accompany heavy-feeding brassicas that benefit from improved soil nitrogen.
Keep apart
onions and garlic (alliums): Alliums are commonly cited as poor companions for beans and other legumes.
How to propagate
Raising favas from seed is about the most rewarding shortcut a vegetable offers, sown straight into the ground where they will run their whole short, productive life.
SeedEasy
Direct-sow in early spring as soon as soil is workable, or in fall in mild-winter climates. · 1 to 2 weeks to germinate in cool soil
Drop favas straight into their final spot, since they take off fast and hate getting moved. Drive the seeds about 2 inches (5 cm) deep into cool, workable soil in early spring, or sow in fall where winters stay mild. They punch through the ground in 1 to 2 weeks, even with a chill still in the soil.
Myths
Fava beans are toxic to everyone and unsafe to eat.
Cooked fava beans land on the plate as safe, nourishing food for most people. The real exception is anyone born with the G6PD enzyme deficiency, who can suffer a serious blood reaction called favism from eating the beans or breathing in the pollen. That comes down to an inherited human condition, not a poison lurking in the plant itself.