Repotting guide

When & how to repot Humulus lupulus (Humulus lupulus)

Also called common hop, hops vine, bine.

More about humulus lupulus

About Humulus lupulus

Humulus lupulus · also called common hop, hops vine · edible

Humulus lupulus, the common hop, is a vigorous herbaceous perennial climber grown for the papery green cones (strobiles) used to flavour and preserve beer. Its rough, twining bines spiral clockwise up supports to 6 m each season, dying back to a hardy rootstock in winter and re-emerging strongly each spring.

Mature size: 6-7 m tall in a single season; spreads via rhizomes at the base.

Watch for — Downy and powdery mildew: The most serious hop disease; causes leaf spotting and ruins cones. Ensure full sun, space bines, water at the base and remove affected growth.

How to tell humulus lupulus needs repotting

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

Roots circling the bottom of the module or pot, or poking out of the drainage holes.
The seedling dries out within a day and growth has visibly stalled.
Roots are white and matted in a tight spiral when you tip the plant out.
It has outgrown its current container for the stage of the season — pot humulus lupulus on before it becomes hard root-bound.

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 humulus lupulus

Pot on seedlings as they grow; not a perennial repot. Humulus lupulusis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Herbaceous perennial bine that twines clockwise up supports with rough, clinging stems; dies back to the rootstock each winter and regrows vigorously each spring..

What size pot to step humulus lupulus up to

Pot humulus lupulus 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 humulus lupulus

Pot humulus lupulus 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 humulus lupulus

Pot on before it is root-bound. Check humulus lupulus regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
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.
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.
Pot into rich mix. Set it into fresh deep, rich, free-draining loam at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water humulus lupulus 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 humulus lupulus

Humulus lupulus wants deep, rich, free-draining loam. Prefers fertile, moisture-retentive but well-drained soil with plenty of organic matter, ideally slightly acidic to neutral (pH 6.0-7.5). Avoid waterlogged ground, which rots the crown. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting humulus lupulus — frequently asked questions

How often should you repot humulus lupulus?

Pot on seedlings as they grow; not a perennial repot for humulus lupulus. Humulus lupulus is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into deep, rich, free-draining loam 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 humulus lupulus need?

When is the best time of year to repot humulus lupulus?

Can you put humulus lupulus straight into a much bigger pot?

No. Even a fast-growing humulus lupulus 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 humulus lupulus after repotting?

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