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Repotting guide

When & how to repot Tomatillo (Physalis philadelphica)

Also called Mexican husk tomato, Husk tomato.

More about tomatillo

About Tomatillo

Physalis philadelphica · also called Mexican husk tomato, Husk tomato · edible

The tomatillo is a sprawling annual nightshade grown for tart green fruit enclosed in a papery husk, the base of salsa verde. Unlike tomatoes it needs two or more plants for cross-pollination and good fruit set. It loves full sun and heat, tolerates some drought once established, and grows into a wide, branching bush that benefits from caging.

Mature size: 1-1.5 m tall and up to 1.2 m wide.

Watch for — Three-lined potato beetle: This pest skeletonises Physalis foliage; handpick adults and larvae and remove egg clusters from leaf undersides.

How to tell tomatillo needs repotting

Repotting on a calendar is less reliable than reading the plant. For tomatillo, 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 tomatillo

Pot on seedlings as they grow; not a perennial repot. Tomatillois grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Wide, branching, semi-sprawling annual bush; grow at least two plants together for cross-pollination, and support with a cage or stakes to keep fruit off the ground..

What size pot to step tomatillo up to

Pot tomatillo 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 tomatillo

Pot tomatillo 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 tomatillo

  1. Pot on before it is root-bound. Check tomatillo 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 free-draining, moderately fertile loam, ph 6.0-7.0 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 tomatillo 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 tomatillo

Tomatillo wants free-draining, moderately fertile loam, ph 6.0-7.0. Tolerates leaner soil than tomatoes and even crops well in poorer ground. Good drainage is essential; overly rich soil promotes foliage at the expense of fruit. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting tomatillo — frequently asked questions

How often should you repot tomatillo?

Pot on seedlings as they grow; not a perennial repot for tomatillo. Tomatillo is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into free-draining, moderately fertile loam, ph 6.0-7.0 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 tomatillo need?

Pot tomatillo 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 tomatillo?

Pot tomatillo 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 tomatillo straight into a much bigger pot?

No. Even a fast-growing tomatillo 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 tomatillo after repotting?

Not immediately. Wait about 1 week after repotting tomatillo. 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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