Loading...
0 items
The most misunderstood mechanic in Grow a Garden 2 is how sprinklers work. The in-game "size" number is actually size luck — an additive stat that sums the size luck of every sprinkler you place and caps at 100. Higher size luck means a higher chance each crop rolls a weight-double on harvest (1% at 0 luck up to 5% at the cap). Because sell value scales ~weight2.65, one weight-double is worth about 6.3× — so size luck is the highest-leverage stat in the game. Past 100, extra sprinklers only add growth speed. Pick what you're placing below to optimize it.
Size luck cap
100
Max double chance
5%
Best single sprinkler
Super Sprinkler
Sprinkler duration
120s
Common Sprinkler
Common · +7 size luck · 1.5× growth
Uncommon Sprinkler
Uncommon · +21 size luck · 2× growth
Rare Sprinkler
Rare · +40 size luck · 3× growth
Legendary Sprinkler
Legendary · +65 size luck · 4× growth
Super Sprinkler
Super · +100 size luck · 5× growth
Add the sprinklers you place on your plot to see your size luck.
Total size luck
Weight-double chance
1.00%
~1 in 100 harvests
2 doubles in a row
0.010%
~1 in 10,000
3 doubles in a row
0.0001%
~1 in 1,000,000
Best growth · radius
—
no coverage
A weight-double roughly multiplies sell value by ~6.3× (value scales ~weight2.65), so size luck is the single highest-leverage stat. Growth speed and radius come from the strongest sprinkler you place; size luck is the sum of all of them.
You're at 0 / 100. The two cheapest ways to hit the cap:
1 Rare + 1 Legendary
= 105 size luck (caps at 100) · 269 Robux
1 Super
= 100 size luck (caps at 100) · 399 Robux
A Rare (+40) plus a Legendary (+65) sums to 105 and caps you at 100. A single Super (+100) caps it on its own. Both leave you at the 5% weight-double ceiling — pick whichever you can afford.
| Sprinkler | +Size luck | Growth | Radius | Duration | Robux | Sheckles | Restock % |
|---|---|---|---|---|---|---|---|
| Common SprinklerCommon | +7 | 1.5× | 20 studs | 120s | 7 | — | 50% |
| Uncommon SprinklerUncommon | +21 | 2× | 25 studs | 120s | 25 | 10,000 | 35% |
| Rare SprinklerRare | +40 | 3× | 30 studs | 120s | 49 | 80,000 | 25% |
| Legendary SprinklerLegendary | +65 | 4× | 40 studs | 120s | 220 | 1,200,000 | 4% |
| Super SprinklerSuper | +100 | 5× | 55 studs | 120s | 399 | — | 2% |
Growth speed is a multiplier (the strongest in range applies); size luck is additive across all placed sprinklers and caps at 100. Every sprinkler lasts 120s before it must be re-placed.
Each placed sprinkler speeds up growth and adds size luck for 120s before it must be re-placed. Growth speed uses the strongest sprinkler in range; size luck is additive across all of them and caps at 100. Size luck is where almost all the value is — it sets your weight-double chance.
Size luck is the additive sum of your sprinklers' size luck (cap 100). It controls the chance a crop rolls a weight-double on harvest — 1% at 0 luck up to 5% at the cap. It's odds, not a flat multiplier.
The Super Sprinkler caps size luck on its own (+100), but a Rare (+40) plus a Legendary (+65) also reaches the 100 cap for fewer Robux. The best pick is whichever reaches 100 cheapest for you — the optimizer above compares both.
Yes, it stacks across every placed sprinkler and caps at 100. At the cap your double chance is maxed at 5%; extra sprinklers past that only add growth speed and coverage, not size.
Weight scales sell value ~weight2.65, so heavier crops are worth far more. Push weight up with size luck: max it to 100 for the best 5% weight-double chance, harvest in volume, and sell the doubled crops. Use the value calculator to see exact payouts by weight.
No. Watering cans only add growth speed — they give zero size luck, so they don't change your weight-double chance. Only sprinklers provide size luck.