Petit Planet Luca Arbor: All 40 Levels & Costs

The Luca Arbor is the main progression tree in Petit Planet. It is a tree on your planet, and upgrading it literally grows the world: beach, farmland, mountains, weather, more farm plots, more neighbor capacity and cosmetic biomes.

It is also the clearest place to see how the game paces itself. The Final Beta had 40 levels. Costs rise in steps, and the big convenience unlocks are deliberately spaced out.

The costs at a glance

• Total from level 1 to 40: 1000 Luca and 770 Lucasprout in the row-by-row Final Beta table.
• Individual levels cost 0–50 Luca and 0–60 Lucasprout.
• Level 1 is free; the first paid upgrade is level 2.
• The most expensive single levels are 30, 35 and 40 (50 Luca).

Milestones that change the game

Level	Unlock	Why it matters
1	Beach area + Luca Fruit slot	Opens beachcombing and the first cosmetic slot
2	Farming	The farming loop begins
3	Farm plots +4	First meaningful crop space
5	Dirt Mound terrain	Digging for surprises
9	Weather	New weather patterns and creature conditions
13	Mountain area	More species and terrain
17	Neighbor capacity +1	One more invite neighbor can settle
23	Meteor shower	A sky event
24	Neighbor capacity +1	Second capacity increase
28	Neighbor capacity +1	Third capacity increase
30	Luca Fruit slot +1	Cosmetic slot
40	Title: Planet Homesteader	Final milestone

The full table below gives every recorded level; the planner turns it into a remaining-cost calculation.

Every level

How to spend Lucasprout

Lucasprout is the scarcer of the two currencies in the early game. It comes from Wandering Stars on Starsea Voyages, daily Season of Snowfall challenges and some story milestones. The expensive sprout levels are 5, 10, 15, 20, 25, 30 and 40 (50–60 each), so plan around those rather than spending every sprout the moment you get it.

Luca comes from story progress and is used only on the Arbor. You cannot convert it into Dough, so there is no reason to hoard it beyond the next level.

A sensible upgrade order

1. Level 2–3 — farming and the first plots. This is the core loop.
2. Level 5 — dirt mounds add a reason to explore your own planet.
3. Level 9 — weather, if you are hunting weather-specific creatures.
4. Level 13 — mountain area for species variety.
5. Level 17 / 24 / 28 — capacity, if you are collecting neighbors.
6. Cosmetic levels — whenever you have spare resources and want the planet to look different.

Do not rush level 40. The title is nice, but the mid-game unlocks are more useful per Luca.

Related pages

• Luca Arbor planner — remaining cost from your current level.
• Farming guide — what to do with the plots.
• Neighbor limit — how capacity upgrades fit together.