Size luck adds up
Every sprinkler covering a crop contributes its full size luck, summed together — until you hit the hard cap of 100. Anything past 100 is wasted.
SPRINKLERS & SIZE LUCK
BIGGER CROPS ON PURPOSE.
Sprinklers add size luck, and size luck makes heavier, far more valuable crops. Here is every tier compared, how stacking really works, and the cheapest way to hit the 100 luck cap.
5SPRINKLER TIERS
100SIZE-LUCK CAP
×5TOP GROWTH SPEED
2 MINEACH LASTS
Sprinklers are the core economy tool in Grow a Garden 2. Higher tiers add more size luck — the stat that decides how heavy your crop grows — plus faster growth and a wider coverage radius. Because sell value scales with weight squared, a fully-lucked crop can be worth many times an un-lucked one.
SprinklerSize luckGrowthRadiusPriceCost / luck
Common Sprinkler
+71.5× speed20 studs3,000429Uncommon Sprinkler
+212× speed25 studs10K476Rare Sprinkler
+403× speed30 studs80K2,000Legendary Sprinkler
+654× speed40 studs1.2M18.5KSuper Sprinkler
+1005× speed55 studs3M30KNotice the last column: the Common Sprinkler gives you the most size luck per Sheckle. The Super Sprinkler is the most expensive per point — you pay for its growth speed, radius and the convenience of capping luck from a single placement.
STACKING RULES
How overlapping sprinklers combine.
The one mechanic that trips players up — luck adds, but growth and radius do not.
Growth & radius take the strongest
Growth speed and coverage radius are NOT summed. A crop uses the values of the single strongest sprinkler reaching it, so ten Common sprinklers still grow at 1.5× speed.
Two minutes, then re-place
Each sprinkler runs for 2 minutes. For long grows, top them up; for a heavy harvest, place them just before you pick to lock in the size-luck roll.
WORKED SETUPS
Three ways to cap size luck.
Every number here is computed with the same stacking engine as the Garden Planner.
Cheapest cap
- Size luck: 100 (5 wasted over cap)
- Growth: 2× · Radius: 25 studs
- Total cost: 50K
Balanced plot
- Size luck: 100 (20 wasted over cap)
- Growth: 3× · Radius: 30 studs
- Total cost: 240K
One-and-done
- Size luck: 100
- Growth: 5× · Radius: 55 studs
- Total cost: 3M
FAQ
Sprinkler questions
What does size luck do in Grow a Garden 2?
Size luck raises the weight your crop rolls at harvest. Because a crop's sell value scales with the square of its weight, heavier crops are worth dramatically more — so size luck is one of the biggest money multipliers in the game. The sell formula is: Base value × (weight ÷ base weight)² × mutation × boosts × quantity.
Does sprinkler size luck stack?
Yes. When several sprinklers cover the same crop their size luck adds together, up to a hard cap of 100. Growth speed and radius do NOT add — those come only from the single strongest sprinkler in range. So stacking many cheap sprinklers is a valid way to reach the luck cap, but it will not give you faster growth than your best sprinkler alone.
What is the cheapest way to reach 100 size luck?
Lower-tier sprinklers are far more Sheckle-efficient per point of luck. A Common Sprinkler costs about 429 per luck point, versus about 30K per point for a Super Sprinkler. Five Uncommon Sprinklers cap size luck for 50K total — the catch is you only get 2× growth and a 25-stud radius, so you cover less ground and crops grow slower.
How long do sprinklers last?
Every sprinkler tier runs for 2 minutes once placed, then has to be re-placed. Plan to top them up during long grows, or place them right before you harvest a heavy crop to guarantee the size-luck roll.
Is the Super Sprinkler worth it?
It is the only sprinkler that hits the 100 size-luck cap on its own, with the fastest growth (5×) and the widest radius (55 studs). It wins on convenience and plot coverage, not on raw efficiency — per point of luck it is the most expensive tier. Buy it to save placement slots and space, not to save Sheckles.
Do sprinklers help single-harvest crops?
Yes — size luck raises the weight of any crop, single- or multi-harvest. Keep in mind single-harvest crops dampen mutation multipliers, so on those the extra weight from size luck matters even more relative to a mutation roll.