Is Strong Fertilizer effect data official?
No. This page confirms the cross-source code reward, but it does not claim an official Strong Fertilizer effect value.
Item detail
Strong Fertilizer page for Build A Ring Farm covering the UPDATE1 code reward and what still needs direct in-game testing.
No. This page confirms the cross-source code reward, but it does not claim an official Strong Fertilizer effect value.
Not yet. It should stay out of calculator math until the effect and stacking rules are directly tested or officially documented.
Direct answer
The source-backed route on this site is the UPDATE1 code, which is listed in local cross-source data as rewarding 3 Strong Fertilizers. The item's exact gameplay effect remains a direct-testing task.

Code UPDATE1: 3 Strong Fertilizers.
Status: Cross-source active.
Exact effect, duration, stacking, shop price, and refresh behavior are not in the verified local model.
This page only promotes facts that are official, cross-source, or already present in the local source-labeled data model. Unsupported values stay marked for testing.
Dexerto, AllThingsHow, RoCodes, and other code pages
UPDATE1 local code row
Third-party code lists still need direct in-game redemption before being marked site-verified.
PCGamesN Build A Ring Farm codes pageRows marked community, conflict, TBA, or needs-testing are not treated as official facts.
Local source-labeled data model
Open the code detail page before treating the reward as in-game verified.
Follow the code redemption steps and keep failed redemption notes visible.
Review which fertilizer facts are supported and which still need testing.
Do not add fertilizer to calculator scenarios until the effect formula is tested.
Strong Fertilizer has its own page because it has search intent and a source-backed code reward.
The page separates acquisition evidence from unconfirmed effect formulas.
Use these related pages to compare calculator results with codes, source notes, and reference tables.
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Use the calculator, codes, sources, and related reference pages together because Roblox game data can change quickly after updates.