Repotting guide

When & how to repot German Butterball Potato (Solanum tuberosum 'German Butterball')

Also called German Butterball potato, yellow fingerling potato.

More about german butterball potato

About German Butterball Potato

Solanum tuberosum 'German Butterball' · also called German Butterball potato, yellow fingerling potato · edible

'German Butterball' is a late-maincrop potato prized for its buttery yellow flesh, golden netted skin and rich flavour. It stores exceptionally well and excels roasted, mashed or baked. A reliable, high-yielding cropper, it is planted from seed tubers in spring and lifted in late summer to autumn once the haulm has died back.

Mature size: Foliage 60-90 cm (24-36 in) tall and wide; tubers medium-large, oval to round.

How to tell german butterball potato needs repotting

Repotting on a calendar is less reliable than reading the plant. For german butterball potato, 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 german butterball potato 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 german butterball potato

Pot on seedlings as they grow; not a perennial repot. German Butterball Potatois grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Vigorous, leafy herbaceous annual with a sprawling haulm; produces a heavy set of tubers on stolons that need hilling to stay covered..

What size pot to step german butterball potato up to

Pot german butterball potato 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 german butterball potato

Pot german butterball potato 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 german butterball potato

Pot on before it is root-bound. Check german butterball potato 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, fertile, free-draining loam, slightly acidic 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 german butterball potato 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 german butterball potato

German Butterball Potato wants deep, fertile, free-draining loam, slightly acidic. Best at pH 5.0-6.0 to limit scab. Loose, organic-rich, stone-free ground lets this late variety size up large, clean tubers; avoid compacted or waterlogged beds. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting german butterball potato — frequently asked questions

How often should you repot german butterball potato?

Pot on seedlings as they grow; not a perennial repot for german butterball potato. German Butterball Potato is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into deep, fertile, free-draining loam, slightly acidic 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 german butterball potato need?

When is the best time of year to repot german butterball potato?

Can you put german butterball potato straight into a much bigger pot?

No. Even a fast-growing german butterball potato 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 german butterball potato after repotting?

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