Types of Beans, Explained: 5 Bean Species, 3 Harvest Styles, and How to Read Your Seed Packet’s Resistance Codes

“Bean” isn’t one plant. It’s a catch-all word English speakers slapped onto five genuinely different species, spread across three plant genera, that happen to produce a similar pod. That’s why a packet of lima beans refuses to sprout in the same cool May soil where your peas are thriving, while fava beans shrug off a light frost that would kill a snap bean seedling overnight. The differences aren’t cosmetic — they’re the reason half the “just plant beans” advice online fails for one type or another.

This guide sorts bean varieties along the three lines that actually matter for choosing what to grow: which species you’re planting, how the plant grows, and how you intend to eat it. It also covers something most variety roundups skip entirely — the disease-resistance letters printed on seed packets and in catalog listings, which tell you more about whether a variety will survive your garden than the name ever will. For planting dates, spacing, and the full growing calendar, see the bean growing guide.

The 5 Plants We All Call “Beans”

Most bean varieties sold in the US belong to one of five species, and knowing which one you’re holding explains almost every quirk in its care sheet. The germination-temperature differences between them likely trace to a documented seed-physiology limit called imbibitional chilling injury: when a seed absorbs cold water (below roughly 45°F) in the first 6-24 hours after planting, the rapid uptake can damage cell membranes before germination even begins [5]. This is best documented in soybean and corn, both large-seeded warm-season crops in the same broad category as lima and cowpea [5] — as a general guideline, it’s the most plausible explanation for why those species’ seed tends to rot rather than just sprout late in cool soil, rather than a coincidence of timing.

Common bean (Phaseolus vulgaris) is the species behind the vast majority of varieties: green beans, wax beans, pinto, black, kidney, navy, and cannellini beans are all the same species harvested at different stages. It wants warm soil (60°F+) and is frost-sensitive at every growth stage.

Skip the guesswork — get a pre-planned 4×8 kitchen garden bed

Free printable planting plan: what goes where, when to plant it, and how to keep it alive. Plus two bonus flower bed plans.

Send me the plans

I agree to receive emails from Blooming Expert and accept the Privacy Policy. Unsubscribe anytime.

Lima bean (Phaseolus lunatus) is a distinct species that cannot be crossed with common bean — it sits in its own genetic pool entirely. It needs warmer soil than snap beans (65°F) to germinate at all, which is why lima seed rotting in the ground is such a common complaint from gardeners who sowed on the same day as their green beans.

Runner bean (Phaseolus coccineus), grown mainly as Scarlet Runner in the US, is more closely related to common bean than lima is, but performs better in cool weather and struggles when summer nights stay hot — the reverse of what most bean species want.

Cowpea (Vigna unguiculata) — black-eyed peas, cream peas, crowder peas, and yard-long (asparagus) beans — belongs to a completely different genus from every bean above. It’s highly tolerant of heat and humidity, germinates only in warm soil, and is more frost-sensitive than common bean, not less [4].

Fava bean (Vicia faba) is a third genus again, and the outlier of the group: it tolerates light frost but not a hard freeze, and it’s planted in early spring — or even fall in mild climates — specifically because it grows best in cool weather common bean can’t survive [2].

Bush, Pole, or Half-Runner: How the Plant Grows

Growth habit is independent of species — you’ll find bush and pole forms within common bean, lima, and cowpea alike. Bush varieties top out around 2 feet, need no support, and typically deliver one or two heavy flushes over 50-60 days. Pole varieties climb 6-8 feet or more, need a sturdy trellis, and bear over a much longer window — generally the higher-yield choice for a small footprint, since production happens vertically rather than spreading across rows [1][2]. Half-runner types split the difference: 3-foot runners that produce more heavily if given a trellis than left to sprawl [1]. For a side-by-side yield comparison in a real garden bed, see Bush Bean vs Pole Bean.

Snap, Shell, or Dry: How You Eat Them

The second axis is harvest stage, and it applies mostly to common bean and cowpea varieties. Snap beans (also called green or string beans) are picked young, when the pod itself is tender enough to eat whole — this includes green, purple, and wax-colored types, plus flat-podded Romano and slender French filet varieties. Shell beans stay on the plant until the seeds inside swell and the pod toughens; you shell them out like peas and cook the seeds fresh rather than eating the pod. Dry beans — pinto, black, kidney, navy, cannellini — are the same plants left on the vine until the pods rattle and the seeds cure hard for storage. A single variety can sometimes serve two purposes: pick it young for snap beans, or let the same plant mature for a dry harvest, which is exactly what a variety like string and pinto beans does.

14 Bean Varieties Compared

The table below covers well-documented varieties across all three growth habits and both major species groups, so you can match a name on a seed rack to what it actually needs.

The single biggest pattern in this table: every variety bred for cold-soil tolerance and disease resistance (Provider, Goldrush, Roma II) is a bush common bean, while every variety suited to hot, humid summers (yard-long bean, cowpeas) belongs to the separate Vigna genus — species choice, not variety name, is what actually adapts a bean to your climate.

Decode the Resistance Codes on Your Seed Packet

Seed catalogs and packets often list a variety as resistant to specific diseases, usually as an abbreviation rather than a full name — this is the detail most bean roundups skip entirely, and it matters more than pod color or flavor description for whether a planting actually survives the season.

The most common one you’ll see on bean seed is resistance to bean common mosaic virus (BCMV) and its more severe relative, bean common mosaic necrosis virus. Both spread primarily through aphids, and BCMV is also carried on the seed itself, which is why an infected seed lot can introduce the virus before a single aphid shows up [3]. Infected plants show blue-green or yellow leaf mottling, curled and unusually glossy leaves, darkened veins, and pods that come out deformed or shiny [3]. There’s no chemical treatment once a plant is infected — resistant genetics and aphid control are the only real defenses [3]. Varieties documented as BCMV-resistant include ‘BB 110’, ‘Goldrush’, ‘Oregon 54’, ‘Oregon 91G’, and ‘Roma II’ [3]; Clemson Extension recommends choosing bush and pole cultivars resistant to both BCMV and anthracnose whenever they’re available [1]. When a catalog listing simply says “disease resistant” without naming the disease, that’s a marketing claim, not a specification — look for the actual disease name or a standardized code before trusting it.

Which Bean Type Fits Your Garden?

Match the plant to the two constraints that actually limit most home gardens: available space and season length. In a small bed with no trellis, bush common bean varieties (Provider, Contender, Bush Blue Lake) mature fastest and need nothing but soil and sun. If you have a fence, trellis, or teepee frame, pole varieties of the same species produce more food per square foot over a much longer harvest window [2]. Gardeners in short, cool-summer climates get better results from bush snap beans or Scarlet Runner than from lima beans, which need consistently warm soil just to germinate [2]. Gardeners in hot, humid regions where common bean stalls in midsummer heat should look at cowpeas and yard-long beans instead — a different genus built for exactly those conditions [4]. And anyone wanting a spring crop before the soil has warmed enough for anything else should start with fava beans, the one species in this group that actually prefers the cold [2].

Container and small-space growers should default to bush common bean varieties over pole or half-runner types — they finish their crop in one compact footprint without any support structure, which matters more on a patio or raised bed than the slightly higher yield a trellised pole variety would offer. See growing beans in containers for pot sizing and variety picks suited to that setup.

Frequently Asked Questions

Are lima beans and green beans the same plant?

No. Green beans are Phaseolus vulgaris; lima beans are the separate species Phaseolus lunatus, which cannot cross-pollinate with common bean and needs warmer soil to germinate.

What does a disease-resistance code on a bean seed packet actually guarantee?

It means the variety has documented resistance to that specific named disease — commonly bean common mosaic virus or anthracnose — under the conditions it was tested in. It doesn’t guarantee immunity to every disease, and a vague “disease resistant” label with no disease named isn’t the same as a tested resistance claim [1][3].

Can I save seed from a snap bean and grow dry beans from it next year?

Yes, for common bean varieties — snap, shell, and dry beans are frequently the same plant at different harvest stages, so seed saved from a mature, dried pod of a snap variety will generally grow true. The exception is hybrid varieties, which won’t reliably reproduce the parent plant’s traits from saved seed.

Sources

1. Clemson Cooperative Extension. Bush & Pole-Type Snap Beans. Home & Garden Information Center
2. University of Maryland Extension. Growing Beans in a Home Garden
3. Washington State University Extension. Bean: Common and Yellow Mosaics. Hortsense
4. North Carolina State University Extension. Vigna unguiculata (Cowpea, Yardlong Bean). Extension Gardener Plant Toolbox
5. Iowa State University Extension and Outreach. Imbibitional Chilling or Cold Injury. Integrated Crop Management