A fast-maturing warm-season crop that rewards minimal effort with heavy flushes of crisp, tender pods from midsummer onward.
Phaseolus vulgaris · also called snap bean, string bean
Windows are counted from the average date of your last spring frost.
Green beans produce a meaningful harvest in as few as 50 days, making them one of the most efficient crops for a small bed. Bush types need no staking; pole types extend the season by bearing over several weeks rather than all at once.
A little history. Native to Mesoamerica and domesticated at least 8,000 years ago, Phaseolus vulgaris fixes atmospheric nitrogen through a symbiotic relationship with soil bacteria that colonize its roots, modestly enriching the bed for the following crop.
Sow seeds 1 inch (25 mm) deep, and aim for 4 inches (10 cm) between plants once thinned. Keep the top inch moist but not waterlogged until sprouts emerge; crusted soil prevents seedlings from pushing through — break any surface crust gently. Seedlings emerge in 5–10 days.
Water deeply every 3–4 days; increase to every 2 days during flowering and pod fill in hot weather. Water when the top inch of soil feels dry to the touch. Aim for about 1 inch per week including rain.
One side-dress (scatter fertilizer along the row and water in) at flowering; avoid heavy feeding before then. What to use: low-nitrogen balanced fertilizer such as 5–10-10 organic; excess nitrogen promotes leaves over pods.
Pole types: pinch the growing tip once vines reach the top of their support to redirect energy into pod production. Bush types need no pruning.
It's ready when pods are firm, smooth, and snap cleanly when bent; seeds inside should be barely visible as small bumps. Bush beans: roughly pencil-thick. Haricot vert types: thinner, at 3–4 inches long. Hold the stem with one hand and pull the pod downward with the other to avoid snapping the branch. Harvest every 2–3 days once pods begin to size up — leaving mature pods on the plant signals it to stop producing.
Unwashed in a perforated plastic bag in the refrigerator crisper drawer for up to 5 days. Blanch and freeze for longer storage — quality holds well for up to 12 months.
Sow bush beans every 2–3 weeks from last frost through midsummer for a continuous harvest rather than one large flush.
Carrot
Carrots pull moisture and nutrients from deeper soil while bean roots feed nearer the surface, so the two can share a row without fighting. Sow carrots on the shaded side of bush beans in hot weather.
Cucumber
Gardeners have long paired these two, and they do at least ask for the same conditions: warm soil, steady moisture, and full sun. Give cucumbers their own trellis space so vines do not smother bush beans.
Summer Savory
Summer savory is said to confuse bean beetles hunting by smell, a pairing repeated in old kitchen-garden charts. Treat it as a low-cost experiment rather than pest control you can rely on.
French Marigold
French marigold reduces root-knot nematodes in soil, but only when planted thickly across the area for a full season or turned in as green matter at the end. A few flowers at the bed edge will not do it.
Radish
Radishes sown alongside young beans can pull leaf-chewing beetles onto their own foliage. Pull and bin the radishes once they are chewed or have sized up, rather than leaving the pests a permanent home.
Onion
Old charts keep beans and onions apart, though no one has demonstrated a mechanism behind it. If space is tight, plant them a row or two apart and watch your own results.
Garlic
Gardeners have long separated garlic from beans, but trials have not shown either plant harming the other. The separation costs little, so follow it only if bed space allows.
Fennel
Fennel roots release compounds that reliably stunt most garden vegetables, beans included. Grow it in its own corner or a pot well away from the bed, where its flowers still feed hoverflies and tiny parasitic wasps.
Leek
Beans are said to sulk beside leeks, onions, and garlic, a pairing warning that has been copied from chart to chart for a century. Trials have not confirmed it, so plant them apart only as a precaution.
Garlic — Hardneck
Old companion charts have kept beans away from the onion family for a century, saying garlic checks their growth. No trial has demonstrated it. If you separate them, do so out of tradition — and note that beans are better used as the crop that follows garlic than as its neighbour.
Chives
Old charts keep the onion family away from beans, claiming stunted growth. No study has shown chives harming beans, so if space is tight this is a low-stakes rule to break; give each a foot of its own room and watch.
Garlic Chives
Old charts keep beans away from every onion relative, garlic chives included. No study has shown the clumps stunt beans, so if space is tight, set them a foot or two apart and judge by what your own rows do.
Walking Onion
Old companion charts keep beans and the onion family apart, and the habit persists in most garden books. No measured mechanism has been found, so if space is tight the pairing is more caution than rule.
French Marigold
Old companion charts keep marigolds and beans apart, though no mechanism has been demonstrated and trials have not supported the pairing. If you have space, separate them; if you do not, there is little reason to expect harm.
Give the pea and bean family 2 years away from this spot before any of its relatives return.
The cabbage family, the beet family or grasses and grains thrive in this ground next season.
Beans give back: cut plants at soil level and the root nodules release nitrogen as they break down. Keep the pea and bean family out of this ground for 2 years, then follow with the cabbage family, the beet and chard family, or corn and other grains.
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