Updated: April 11, 2026 
In Petit Planet, growing your planet bigger is important to unlock more progression, and you need the Luca Arbor for that. The more you grow it, the bigger and more beautiful your world becomes. Here's everything you need to know about Petit Planet Luca Arbor progression, so you can follow the steps on how to level it up.
What Is the Luca Arbor in Petit Planet?
The Luca Arbor is a special tree on your planet. You feed it with a material called Luca, a resource you earn by completing tasks around your world and for your neighbors. Every time you give Luca to the tree, it levels up and unlocks new stuff for your planet.
The first and most reliable way is by completing tasks for your neighbors. Socializing is a big part of Petit Planet, so the game rewards you for helping the people around you. When a neighbor asks for something, do it. The Luca adds up fast.
The second way is by finishing activities on your own planet. This includes farming, fishing, foraging, collecting bugs, and just playing through the normal daily stuff the game gives you. You will not always get huge amounts this way, but it keeps a steady flow coming in.
There is also a special type called Neighbor's Luca, which is a unique Luca Fruit that only your neighbors can give you. You will need this for specific unlocks at levels three and five.
Luca Arbor Progression Guide in Petit Planet
The Luca Arbor goes all the way to level 10, and each level comes with multiple things to unlock. Some cost Luca, and some are completely free once you hit that level.
Here's exactly what you unlock at each level and what it costs:
| Level | Upgrade | Description | Cost |
|---|---|---|---|
| Lv. 1 | Beach Region | A whole new area opens up where you can beachcomb and forage for items | Luca ×1 |
| Lv. 1 | Mysterious Archiboo | Mysterious little creatures called Archiboo appear all over the planet | Luca ×1 |
| Lv. 2 | Luca: Starlined Meadows | A decorative Luca Fruit that adds star patterns to your planet's grasslands | Luca ×1 |
| Lv. 2 | Terrain: Dirt Mound | Mysterious "breathing" dirt mounds appear — dig into them to find hidden surprises | Luca ×1 |
| Lv. 2 | Farming Plots +10 | 10 more plots open up for farming | Luca ×1 |
| Lv. 3 | Luca: Neighbor's Unique Luca | A special decorative Luca Fruit from your neighbor | Neighbor's Luca ×1 |
| Lv. 3 | Farming Plots +10 | 10 more plots open up for farming | Luca ×1 |
| Lv. 3 | Ecology: Potato Seeds | Your planet gifts you potato seeds — plant them for your first harvest | Luca ×1 |
| Lv. 4 | Mountain Region | Mountains rise up on your planet, opening new terrain and welcoming more life | Luca ×1 |
| Lv. 4 | Farming Plots +10 | 10 more plots open up for farming | Luca ×1 |
| Lv. 4 | Ecology: Cabbage Seeds | Your planet gifts you cabbage seeds to plant and harvest | Luca ×1 |
| Lv. 5 | Luca: Neighbor's Unique Luca | Another special decorative Luca Fruit from your neighbor | Neighbor's Luca ×1 |
| Lv. 5 | Farming Plots +10 | 10 more plots open up for farming | Luca ×1 |
| Lv. 5 | Ecology: Peach Tree | Peach trees sprout across the planet and change with each season | Luca ×1 |
| Lv. 6 | Meteor Shower | Your Luca Arbor connects with the universe, creating a stunning meteor shower spectacle | Free |
| Lv. 6 | Farming Plots +5 | 5 more plots open up for farming | Free |
| Lv. 7 | Luca Fruit Slot +1 | A new slot opens on the Luca Arbor branches for placing decorative Luca Fruits | Luca ×2 |
| Lv. 7 | Farming Plots +5 | 5 more plots open up for farming | Free |
| Lv. 8 | Luca Fruit Slot +1 | Another new slot opens on the Luca Arbor for Luca Fruits | Free |
| Lv. 8 | Farming Plots +5 | 5 more plots open up for farming | Free |
| Lv. 9 | Luca Fruit Slot +1 | Another new slot opens on the Luca Arbor for Luca Fruits | Free |
| Lv. 9 | Farming Plots +5 | 5 more plots open up for farming | Free |
| Lv. 10 | Luca Fruit Slot +1 | The final new slot opens on the Luca Arbor for Luca Fruits | Free |
Levels 7 through 10 focus on opening up Luca Fruit Slots on the branches of your Luca Arbor. Each slot lets you place a decorative Luca Fruit that changes how your planet looks. Most of these unlocks are also free, which is a nice bonus for players who push through to the later levels.
How to Get Neighbor's Luca Fruits
This is something a lot of players miss at first. The Neighbor's Luca you need for levels three and five does not come from doing tasks. To get a Neighbor's Luca Fruit, you need to help level up your neighbor's planet to level 6. When their planet reaches level six, they send you a special Luca Fruit as a gift of appreciation. That fruit is unique to their planet and reflects their world's own Luca essence.
The way you help a neighbor level up is through Archiboo. These are the little creatures that unlock on your own planet at level one. You send them over to your neighbor's planet, and they help push that planet's progression forward. The more neighbors you help level up, the more unique Luca Fruits you collect, and the more your planet becomes a layered mix of all these different worlds coming together. That is honestly one of the best parts of Petit Planet.
What Are Luca Fruits?
Luca Fruits are decorative items you place on your Luca Arbor's branches. Each one changes something visual about your planet, like the grass, the sky, the ocean, the cliffs, and the rivers.
Here is every known Luca Fruit in the game right now and what each one does:
| Luca Fruit | Luca Fruit Icon | Name | Neighbor | Effect |
|---|---|---|---|---|
| 1 |  | Bamboo Brooks | Yunguo | Makes the rivers clearer and gives a green bit gradient to your planet's rivers |
| 2 |  | Shimmering Seas | Frostia | Gives a glimmer to the normal ocean, making it glow |
| 3 |  | Dragonstone Reef | Mors | Turns the reddish stone reef into blue-green spotted colors |
| 4 |  | Pinecone Constellation | TBA | TBA |
| 5 |  | Starbloom Meadows | Mobai | Decorates the planet's grass with flower-shaped patterns |
| 6 |  | Crimsonclouds Cliffs | TBA | Turns normal brownish cliffs into a rosy sunset cloud color palette |
| 7 |  | Pawprint Sigil | Isaki | Decorates the sky with paw print stars instead of normal orange stars |
| 8 |  | Drowsy Clouds | Medowlyn | Turns normal clouds in the sky into sheep-shaped clouds |
| 9 |  | Oasis Mirage | Msafiri | Adds a gradient effect to the seas |
| 10 | TBA | TBA | TBA | Turns the planet's grass purple |
| 11 | TBA | Starlined Meadows | Mobai | Adds star patterns to the planet's grasslands |
| 12 | TBA | TBA | TBA | Adds seashells to the beach |
What Happens After Level 10?
Once your Luca Arbor is fully grown, you unlock full terraforming for your planet. You can raise and lower hills, build waterfalls and ponds, change the ground patterns and sky colors, and even place inclines and bridges to reach higher spots. Your planet stops being a starter world and becomes something that is completely your own.
The Luca Arbor progression in Petit Planet is one of those systems that rewards you for just playing regularly. This game is a calm, casual game, so there is no rush, no timer, and no pressure. Just keep playing at your own pace, water the tree regularly, and your planet will grow into something worth showing off. If you need more information about the game, like a Beginner's Guide or how to get Dough, you can always check out our Petit Planet wiki.
