The biggest permanent power spikes in Sell Lemons all come from the same place. You reset your progress on purpose, and in exchange you keep a multiplier that never goes away. Rebirth feeds you investors, and those investors unlock Evolution, which is where the truly massive income-speed buffs live. Every fruit tier you evolve into stacks on top of the last one, so the numbers climb far faster than any upgrade you can buy off the ground.
Quick answer: Unlock Rebirth by pushing your base valuation to roughly 77 Sextillion, spam Rebirth to farm investors, and at 501.2 Quadrillion investors a Void Evolution portal spawns. Enter it, touch the Void Altar, fill the menu to 100%, and hit Evolve for a permanent x42 income-speed jump.
The three buff layers that stack
Sell Lemons has three separate systems that grant lasting boosts, and they do not cancel each other out. Knowing which one to chase at each stage stops you from grinding cash that a reset would wipe anyway.
| System | What it gives | Survives a reset? |
|---|---|---|
| Rebirth (Ascend) | Investors and account-wide growth boosts | Yes, permanent multipliers |
| Void Evolution | x42 income-speed buff per tier, stacking | Yes, income speed is permanent |
| Sci-Fi Labs | Permanent research and robotics buffs | Yes, persists through every Ascend |
On top of these, Cosmic Investor deals and Cosmic Cash hand you temporary global multipliers. Those are short-lived, so treat them as accelerators for reaching the next permanent milestone rather than the goal itself.
Unlock Rebirth first (the investor engine)
Rebirth is the gate for everything else. It becomes available once your total base valuation reaches roughly 50 to 100 Sextillion, which works out to around 77 Sextillion Cash in practice. That figure is not just the money sitting in your wallet. The game counts your full progression value, including cash you already spent on stat upgrades and buttons around your base, so keep buying instead of hoarding.
Once unlocked, Rebirth is the best way to earn investors, and investors are the currency Evolution reads. Reset, rebuild, and repeat. Do not neglect Powers while you grind, because they speed up how quickly your investor count climbs toward the Evolution threshold.
How to unlock Evolution in Sell Lemons
You start the game as a Lemon. The first Evolution turns your fruit into an Orange and grants a x42 income-speed buff, meaning you progress about 42 times faster than the previous tier. Each following Evolution multiplies on top of the last, so the totals get absurd quickly.
All Evolution fruit tiers and multipliers
There are nine Evolution levels beyond the starting Lemon. The required investors and total stacked speed multiplier for each fruit are below.
| Fruit | Required Investors | Total Speed Multiplier |
|---|---|---|
| Lemon | 0 | x1 |
| Orange | 501.2 Quadrillion | x42 |
| Lime | 19.95 Nonillion | x1,764 |
| Grapefruit | 794.3 Tredecillion | x74,088 |
| Tangerine | 31.62 Octodecillion | x3,111,696 |
| Pomelo | 1.259 Tresvigintillion | x130,691,232 |
| Abyssalime | 50.12 Septenvigintillion | x5,489,031,744 |
| Nullfruit | 1.995 Duotrigintillion | x230,539,333,248 |
| Voidmelon | 79.43 Sextrigintillion | x9,682,651,996,416 |
| Purity | 3.162 Unquadragintillion | x406,671,383,849,472 |
Because every multiplier stacks with the ones before it, the practical strategy is simple. Focus on Rebirth to farm investors, evolve the moment you can afford the next tier, and repeat until you reach Lime, then keep climbing toward Purity.
Accelerators that get you to the next buff faster
Three things shorten the grind between resets. Use them and the investor thresholds arrive far sooner.
- The Sewer area offers two separate acceleration methods you cannot get anywhere else on the surface. Work it fully while you push investors.
- Sci-Fi Labs research and robotics buffs are permanent and carry through every Ascend, so investing there compounds over your whole account.
- Cosmic Investor deals from Aliens hand out temporary global multipliers and Cosmic Cash that bypass standard timers, ideal for closing the gap to an Evolution threshold.
Note: Remote Buy unlocks around Evolution 6, but it costs a Trigentillion investors. That total only lands minutes before you would Ascend anyway, so it is far less useful than its unlock tier suggests. Do not build your plan around it.
How to confirm the buff applied
After you click Evolve, your fruit changes to the next type and your income-speed multiplier updates to the value in the table above. If the portal never appears, the cause is almost always one of two things. Either Rebirth is not unlocked yet, or your investor count has not reached the exact threshold for the tier you want. Both are fixed the same way, which is more Rebirth cycles until the number is met.
Play the loop the way the game is built for it. Grow, sell, upgrade, Rebirth for investors, then Evolve for permanent speed. Each pass through that cycle makes the next one dramatically shorter, and the stacked multipliers are what carry a lemonade stand all the way to Purity.
