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Luca Arbour
May 16, 2026 at 08:30 AM
Initial Luca Arbour system page covering the planet-progression tree, level unlocks, Luca Fruits, and Neighbor Luca.
The Luca Arbour (also called the Luca Tree) is the central tree at the heart of every player's planet in Petit Planet. It is the focal point of planet progression: players collect Luca through daily activities and pour it into the Arbour, which absorbs the energy and reshapes the world. As the Arbour grows, new biomes, areas, and customization options unlock across the planet.
Players carry Jars of Luca back to the Arbour and offer them to advance its level. Each level threshold unlocks a new area or feature on the planet. Unlike construction-style city-builders, the Arbour does not show scaffolding or work crews. Instead, when a milestone is reached the planet visibly transforms: a beach appears, a mountain region opens, or a new biome unfurls.
Arbour Level | Unlock |
|---|---|
1 | Beach area becomes accessible along the edge of the starting plot. |
4 | Mountain region opens for Mining and Crafting and the Pogo Stick traversal route. |
Higher levels | Continue to unlock additional biomes, expanded crop fields, and new Neighbor housing slots. Exact thresholds vary by build. |
Once the Arbour reaches certain growth points, it produces Luca Fruits that hang on its branches. Luca Fruits are special customization items that adjust large parts of the planet at once: a Sunset Cliffs fruit reshapes the coastline, a different fruit might tint the sky lavender or turn the grass into pale moss. Players also receive Luca Fruits as gifts from Neighbors at high friendship bonds, which expands Planet Customization options beyond what the Arbour grows on its own.
The Arbour accepts two distinct kinds of Luca:
Type | Source | Purpose |
|---|---|---|
Regular Luca | Waters the Arbour and counts toward its base growth. | |
Neighbor Luca | Gifted by Neighbors when the player completes friendship quests or reaches bond milestones. | Enables larger planet upgrades that cannot be reached with regular Luca alone. |
A signature design choice is that area unlocks are kept hidden until the milestone fires. Players will not see the next biome staked out behind a fence or shown as a locked overlay. Instead the planet simply reveals it as the Arbour absorbs enough Luca, which keeps the rhythm of long-term play exploratory rather than checklist-driven.
Friendship with Neighbors is the most efficient Luca source because each completed quest gifts Neighbor Luca directly. Pairing daily farming and fishing routines with at least one or two Neighbor quests keeps the Arbour growing on both tracks.
Keep rare crops and high-quality fish for the Arbour rather than selling them to Glenn. The Arbour rewards higher-quality offerings with more growth per item.
