🫘 Liana Yardlong Bean

Vigna unguiculata subsp. sesquipedalis ‘Liana’
The day-neutral early bird: producing in about 70 days regardless of day length — and the fall-crop pick for warm climates.
Sun
Full sun, 6+ hours
Days to harvest
70 days from germination
Spacing
4–6 inches apart along a trellis; rows 30–36 inches apart (species standard)
Soil pH
6.0–7.0
Zones
Frost-sensitive annual; best in warm climates

What it looks like

Liana Yardlong Bean (species photo)
Vigna unguiculata 01. Photo: Amada44, Public domain. Species photo — no verified photo of this variety itself exists.
Liana Yardlong Bean (species photo)
Vigna unguiculata subsp. sesquipedalis JRVdH 01. Photo: Cephas, CC BY-SA 4.0. Species photo — no verified photo of this variety itself exists.
Liana Yardlong Bean (species photo)
Vigna unguiculata subsp. sesquipedalis JRVdH 02. Photo: Cephas, CC BY-SA 4.0. Species photo — no verified photo of this variety itself exists.

Why this variety

Liana is the yardlong for gardeners who plant late or garden by the calendar’s second act: a day-neutral variety that starts producing early — about 70 days after germination — regardless of day length, and is specifically recommended as a fall crop in warm climates. Most legumes sulk or wait for the right photoperiod; Liana just grows.

That day-neutrality is gold in Florida, where a late-summer sowing can still produce a full fall crop before cold arrives, and a spring sowing does not have to wait for long days to get going. The pods are the classic long, slender, stringless type, best picked young, on a vigorous vine that wants a tall trellis and regular picking.

How to grow

Direct-sow after all danger of frost, when soil is at least 65–70°F; cold soil rots the seed. Sow about an inch deep at the base of a sturdy trellis at least 6 feet tall — these vines are heavy and need real support. They are heat-loving and frost-sensitive, thriving at 77–95°F, and they fix their own nitrogen, so inoculating seed with cowpea-type inoculant helps on ground where cowpeas have never grown.

Water & feeding

Water deeply at the base, about an inch a week, and more during flowering and pod formation; dry soil at flowering gives low yields and fibrous pods. Do not over-fertilize with nitrogen — you will get leaves instead of beans. Compost at planting and a low-nitrogen side-dress when pods form is plenty.

Common problems

  • Cold, wet soil — wait for warm soil; seedlings collapse in cold ground.
  • Aphids and bean beetles — row cover early, hand-pick, and encourage ladybugs.
  • Rust and mildew in humid weather — space for airflow, water at the base, and remove badly affected leaves.
  • Tough pods — you waited too long; pick young and pick often.

Harvest

Pick at 12–18 inches long, still slender, firm, and flexible, every 1–2 days at peak. For a fall crop, sow in late summer so vines are established before days shorten — Liana does the rest.

Nerdy fact: Day-neutral plants ignore the calendar cue most plants obey: they flower by age, not by day length. For a fall crop in warm climates, that is the difference between beans in November and a vine that is still ‘waiting for the right light’ when frost arrives.

For the crop in general, see the Yardlong Bean growing guide. Browse all plant & pest guides.

Saving seeds

Liana is a day-neutral yardlong bean that starts producing early, about 70 days after germination, and it is grown from seed — direct-sow after all danger of frost. Whether Liana itself is open-pollinated or a hybrid isn’t pinned down in the sources we checked, so saved seed is a gamble: let a few pods dry fully on the vine and collect the seed, but buy fresh seed if you want the variety exactly as sold. The full method is in the Saving seeds section of the Yardlong Bean guide.