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Repotting guide

When & how to repot Avocado (Persea americana)

Also called Hass avocado, Fuerte avocado, alligator pear.

About Avocado

Persea americana · also called Hass avocado, Fuerte avocado · edible

Avocado is an evergreen tree from Central America that grows easily as a houseplant from a kitchen pit, though indoor specimens rarely fruit. Outdoor trees in zones 9-11 produce reliably once mature. Toxic to pets, especially birds.

The avocado (Persea americana, family Lauraceae) is a subtropical evergreen tree. Per the ASPCA its leaves, fruit, seeds and bark contain persin, which can cause vomiting and diarrhea in dogs and more severe cardiovascular signs in birds, rabbits, horses and ruminants.

Prefers a pH of roughly 6-6.5; in alkaline soils trace nutrients like zinc become unavailable, causing chlorosis. On heavy clay, plant on a raised mound 1-2 ft high for drainage. Mulch and irrigation are the two most important factors for avoiding root rot.

Mature size: 6-20 m outdoors; 1.5-2 m in pots

Watch for — Yellow leaves: Overwatering and root rot, or iron chlorosis in alkaline soil.

Sources: aspca.org, ipm.ucanr.edu, ucanr.edu

How to tell avocado needs repotting

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

Pot on seedlings as they grow; not a perennial repot. Avocadois grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Evergreen tree.

What size pot to step avocado up to

Pot avocado 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 avocado

Pot avocado 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 avocado

  1. Pot on before it is root-bound. Check avocado 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 slightly acidic loam 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 avocado 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 avocado

Avocado wants free-draining slightly acidic loam. pH 6.0-7.0. Container mix with extra perlite. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting avocado — frequently asked questions

How often should you repot avocado?

Pot on seedlings as they grow; not a perennial repot for avocado. Avocado 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 slightly acidic 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 avocado need?

Pot avocado 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 avocado?

Pot avocado 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 avocado straight into a much bigger pot?

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

Not immediately. Wait about 1 week after repotting avocado. 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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