Indiana · zones 5b–6b
When to plant green beans in Indiana.
Sow between Apr 22 to Jun 12 in a typical year, keyed to Indiana's median last frost around Apr 22. A second, fall sowing fits Jul 3 to Aug 5. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Green Beans dates for a typical Indiana season.
Direct sow
Apr 22 to Jun 12
Keyed to the ~Apr 22 last frost. Sow 1" deep, 3" apart.
Fall round
Jul 3 to Aug 5
Counted back from the ~Oct 17 first frost.
Harvest
~55 days later
~0.75 lb per plant over ~3 weeks.
Indiana spans more than one climate: Zone 6 is the most common zone, but the state runs 5b to 6b. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
Indiana growing notes
Bush beans get both a spring and a fall window here, and with as many as 13 sowings possible in a season, keeping pods coming matters more than nursing one planting.
Two windows, and spring is the more forgiving one
Bush beans need only 55 days to bear, fast enough that Indiana's roughly 178-day season fits both a spring planting and a second one later for a fall harvest, with room for as many as 13 staggered sowings for anyone chasing a steady picking instead of one big flush. That speed is why growers here lean on succession: a planting's best window is short, pods go from tender to tough within about a week of reaching size, so a steady supply means starting a new row on 3-inch spacing every couple weeks rather than stretching one planting as far as it will go.
Of the two windows, spring is the more forgiving. A planting set once frost danger has passed matures in under two months and finishes its picking before Indiana's muggiest stretch sets in, the stretch that pushes rust and anthracnose hardest. A fall planting does the opposite: it spends its whole 55 days maturing through the most humid weeks of the year, then has to finish before frost closes out the season, carrying more disease pressure on a shorter clock. That's not a reason to skip it: a fall sowing often delivers a full second harvest, but it's the planting worth checking more often.
The pest most growers mistake for a beneficial
Mexican bean beetle is a genuine look-alike problem. The adult is a coppery, oval beetle covered in rows of small black spots, close enough to a beneficial lady beetle that plenty of growers let the first ones go unchecked. The real tell is the underside of a leaf: Mexican bean beetle lays clusters of yellow-orange eggs there, standing on end like tiny bundles, and the larvae that hatch are soft, spiny, yellow grubs that don't resemble a lady beetle larva at any stage. Both the adult and the spiny yellow larvae feed from the underside, skeletonizing leaves into a lacy pattern of veins.
Aphids on beans cluster on new growth and the undersides of young leaves same as most crops, but a row planted at 3 inches between plants packs tender new growth close together, so a colony that starts on one plant has an easy path to its neighbors down the row. Checking a handful of plants scattered through the row, rather than only the ones nearest the edge, catches a colony that has already spread before it shows up as obvious curling on every plant.
Two leaf diseases and one pod disease, told apart fast
Indiana's humid air brings a rust and a powdery mildew onto this crop's leaves, and they don't look anything alike once you know what to check. Rust breaks out as small, reddish-brown pustules on the underside of a leaf that rub off as an orange dust on a finger. Powdery mildew sits right on top of the leaf as a plain white, talcum-like coating that spreads even through a dry week, since it doesn't need standing water the way rust does. Anthracnose is the one to watch on the pods themselves: dark, sunken lesions, sometimes with a faint pink cast in humid weather, that pit the pod wall and open the door to rot behind them.
Anthracnose also moves fastest on wet hands and wet clothing brushing through a row, which matters more here since a garden running several bean sowings at once means picking one planting and walking straight into a younger one nearby. Picking beans once the dew has dried, and working through a clean-looking planting before touching one with visible pod lesions, keeps a grower from carrying anthracnose from an older sowing into a fresh one. Rust and powdery mildew travel on the wind regardless of who is walking the row, so thinning crowded plants for airflow does more against those two than any picking order can.
In Indiana: watch for
The pests that find green beans here.
A middle-length season, about 178 frost-free days, means bush bean overlaps mexican bean beetle for a stretch each summer. Check plants every week or two and treat early.
Coppery ladybug-like beetles; leaves skeletonized to lace.
Organic fix: Handpick adults and yellow egg clusters; neem.
Orange or white spots on leaves late in the season.
Organic fix: Water at the base, space plants, spray neem.
Anthracnose
Sunken dark-red cankers on the pods, and leaf veins turning brick-red to black underneath.
Organic fix: Start with certified seed, water at the base, and stay out of the patch while the leaves are wet.
Your season math: Indiana gives green beans about 178 frost-free days, and it needs roughly 55 days to a first harvest. That fits about 13 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting green beans in Indiana: questions
When should I plant green beans in Indiana?+
In a typical Indiana year, sow green beans between Apr 22 to Jun 12, keyed to the state's median last frost around Apr 22. There's also a fall window: Jul 3 to Aug 5. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Indiana?+
Indiana spans zones 5b–6b, mostly zone 6. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many green beans plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.