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Repotting guide

When & how to repot Haricot Vert (Phaseolus vulgaris 'French Filet')

Also called Haricot Vert, French Filet Bean, French Green Bean, Filet Bean.

More about haricot vert

About Haricot Vert

Phaseolus vulgaris 'French Filet' · also called Haricot Vert, French Filet Bean · edible

The classic French fine bean: slender, stringless, pencil-thin pods harvested at 10–13 cm for peak tenderness and flavour. Bush varieties mature early in 50–60 days, making succession sowing every 2–3 weeks highly productive. Prized for gourmet texture and versatility. Requires consistent harvesting every 2 days once pods begin forming to maintain quality.

Mature size: 40–55 cm tall; pods 10–13 cm

How to tell haricot vert needs repotting

Repotting on a calendar is less reliable than reading the plant. For haricot vert, watch for these signs:

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot haricot vert

Pot on seedlings as they grow; not a perennial repot. Haricot Vertis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Compact, erect bush annual; self-supporting.

What size pot to step haricot vert up to

Pot haricot vert on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot haricot vert

Pot haricot vert on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Step-by-step: repotting haricot vert

  1. Pot on before it is root-bound. Check haricot vert regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
  2. Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
  3. Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
  4. Pot into rich mix. Set it into fresh fertile, well-drained loam, ph 6.0–6.8 at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
  5. Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water haricot vert in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for haricot vert

Haricot Vert wants fertile, well-drained loam, ph 6.0–6.8. Enrich with well-rotted compost before sowing but avoid excess nitrogen. Haricot verts respond to a phosphorus-rich soil, which promotes root development and early flowering. Avoid freshly manured ground, which causes lush, pod-light plants. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting haricot vert — frequently asked questions

How often should you repot haricot vert?

Pot on seedlings as they grow; not a perennial repot for haricot vert. Haricot Vert is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into fertile, well-drained loam, ph 6.0–6.8 so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.

What size pot does haricot vert need?

Pot haricot vert on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot haricot vert?

Pot haricot vert on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Can you put haricot vert straight into a much bigger pot?

No. Even a fast-growing haricot vert should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise haricot vert after repotting?

Not immediately. Wait about 1 week after repotting haricot vert. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.

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