The April 2026 Flower Festival is your single best Diamond-farming window of the year. Community testing confirms F2P players can realistically earn 1,140–1,417 locked Diamonds by stacking all available methods across the ~16-day event. That's enough to make serious progress toward the 10-day SSR banner — without spending a cent. Here's exactly how to do it, ranked by return on time.
What Is the Idol Party Flower Festival? (April 2026 Overview)
The Flower Festival runs approximately 16 days in early April 2026, overlapping with a 10-day SSR banner. It introduces Festival Petals as event currency, a dedicated Exchange Store, the Romantic Puzzle activity, and a Solo NPC path — all stacked on top of the game's permanent systems. Community guides confirm this is the highest Diamond-density event observed in 2026 so far.
The currency loop: Complete event tasks → earn Festival Petals → exchange in the Flower Festival Event Shop for items and Diamond-adjacent rewards. Some activities drop locked Diamonds directly; others convert through the shop.
F2P feasibility: Yes, you can hit the top reward tier without spending. But it requires logging in daily, completing the Solo NPC path consistently, and not missing the April Fools Welfare overlap. Miss two or three days and the ceiling drops noticeably.
⚠️ All figures below are community-observed from guide testing. No official April 2026 patch notes were publicly available at time of writing — treat specific numbers as reliable estimates, not developer-confirmed values.
Method 1: Daily Login Streak — The Non-Negotiable Foundation
Yield: ~200 Diamonds (days 1–2) + 30–60 Diamonds at milestones (days 7, 14, 28)
Log in through the event tab, not just the main lobby — the Flower Festival login track is separate from the standard daily reward. Days 1 and 2 together pay out 200 Diamonds plus the Ray Dance avatar frame, confirmed by community reports. Miss day 1 and you lose that chunk permanently; there's no catch-up mechanic.
Milestone days 7, 14, and 28 each award 30–60 Diamonds. The day-28 reward exists outside the ~16-day Flower Festival window, so it feeds into the broader April login track rather than the event specifically.
Don't break your streak. This is the most common F2P mistake documented in community forums. A single missed day resets streak bonuses and costs you compounding rewards. Set a daily alarm if you have to — the login itself takes under 30 seconds.
Method 2: Daily & Weekly Mission Completions
Yield: ~42–70 Diamonds over 14 days (3–5 Diamonds/day)
Daily missions are modest individually but reliable. At 3–5 Diamonds per day across 14 active days, they contribute 42–70 Diamonds with zero event-specific effort — most missions overlap naturally with Flower Festival tasks anyway.
Check the Mission & Quest Board each session. Prioritize missions that double-count toward Flower Festival progress (NPC interactions, Romantic Puzzle completions). You're already doing those for Method 5 — claim the mission reward on top.
Weekly missions pay bonus Diamonds on reset. Don't let weekly progress sit unclaimed over the weekend; the reset wipes unfinished progress, not just the reward.
Method 3: Achievement Milestone Unlocks
Yield: Variable — audit on days 1, 4, 8, and 12 specifically
Here's what most guides skip: the Achievement Gallery requires manual audits on specific days (community testing identifies days 1, 4, 8, and 12) to trigger unlocks. Log in and forget to check? The unlock doesn't auto-claim. You miss it.
New players have the highest upside here — first-time achievements for pulling, completing story chapters, and reaching relationship milestones all pay out. Veterans have likely claimed most one-time rewards already, but Flower Festival-specific achievements (completing the Solo path, finishing Romantic Puzzle stages) are fresh for everyone.
Practical step: bookmark the Achievement tab. Open it on each audit day before doing anything else.
Method 4: Social & Club Participation Rewards
Yield: Included in the 1,140–1,417 combined total; exact split community-estimated
Club (guild) participation during the Flower Festival contributes to group milestones that pay out shared Diamond rewards. If you're not in an active club, join one before the event ends — passive participation still counts toward thresholds.
The Flower Festival also includes social sharing bonuses tied to event activities. These are lower-yield individually but require almost no extra time if you're already completing daily tasks. Community guides note these as "stack and forget" — set them up once, collect periodically.
Method 5: Flower Festival Event Tasks & the Solo NPC Path
Yield: 988 locked Diamonds + 100 participation reward = 1,088 Diamonds
This is the single highest-yield method available. Full stop.
The Solo NPC path inside the Flower Festival delivers 988 locked Diamonds upon completion, plus a 100-Diamond participation reward — 1,088 Diamonds total from one source. Community testing ranks this as the top priority by a wide margin.
How to access it:
Open the Flower Festival event tab
Navigate to the Solo NPC path (separate from the main story)
Complete each path segment daily — don't batch them at the end
Claim the 988 + 100 rewards before the event closes
The Romantic Puzzle and other festival minigames earn Festival Petals for the Exchange Store. Convert those petals strategically — prioritize Diamond-equivalent rewards over cosmetic items unless you've already claimed all Diamond options.
Flower Prayer Cards also generate festival tokens. Feed them into the Exchange Store, not into pulls, until you've exhausted the Diamond-value items.
Method 6: April Fools Welfare Event Overlap
Yield: 400 free Diamonds + 800 in additional rewards
The April Fools Welfare Event runs concurrently with the Flower Festival in early April 2026. Community guides confirm 400 free Diamonds plus 800 Diamonds' worth of additional rewards from this overlap — that's a significant chunk that players focused only on the Flower Festival miss entirely.
Claim it through the event tab during the overlap window. It doesn't require separate grinding; it's largely login- and task-based. The overlap is time-limited, so check the event tab in the first week of April specifically.
This is the stacking mechanic that pushes the F2P ceiling from ~1,140 to ~1,417 Diamonds. Don't treat the two events as separate — they're additive.
Method 7: Promo Codes
Yield: Variable; no active codes confirmed as of April 1, 2026
Community tracking shows the last confirmed active code (IT7BQGSC1V) expired March 12, 2026. A weekly gift code WYWAFZH7AJ expired April 9 at 23:59 UTC. As of early April 2026, no active codes are confirmed — but developer codes drop unpredictably around events.
Where to find them:
Official Idol Party social media (Facebook, Instagram)
Developer livestreams and anniversary announcements
Community Discord servers (verify before redeeming — fake codes circulate)
How to redeem: Go to your profile in the main lobby → code redemption field → enter in ALL CAPS → check your in-game mailbox. Rewards can take up to 30 minutes to arrive; contact support if nothing appears after that.
Unconfirmed reports suggest a Flower Festival-specific code may drop mid-event. Watch official channels around April 7–10.
Full Optimization Plan: Combining All 7 Methods
Community testing confirms the 1,140–1,417 range comes from stacking every method simultaneously. Here's the breakdown:
Day-by-day priority framework:
Days 1–2: Claim login rewards immediately (200 Diamonds + Ray Dance frame). Start Solo NPC path. Audit achievements. Activate April Fools event.
Days 3–6: Daily missions + NPC path segments. Check Exchange Store for Diamond-value items.
Days 7–8: Milestone login reward. Achievement audit (day 8). Watch for promo code drops.
Days 9–12: Continue NPC path. Achievement audit (day 12). Convert Festival Petals.
Days 13–16: Final NPC path completion. Claim all remaining event rewards before close. Don't leave Festival Petals unconverted.
What to spend Diamonds on: Gacha pulls cost 160 Diamonds each, with hard pity at 28 pulls (4,480 Diamonds total). The 10-day SSR banner is the primary target. With 1,140–1,417 locked Diamonds from free methods, you're covering roughly 7–9 pulls. Prioritize locked Diamonds for the limited banner before touching any free Diamonds on standard pulls.
Common Mistakes That Cost Players Free Diamonds
Breaking the login streak is the most expensive error. One missed day doesn't just lose that day's reward — it resets streak multipliers. The compounding loss over 14 days is significant.
Skipping the Achievement audit days. Days 1, 4, 8, and 12 are the windows. Miss them and unlocks don't trigger. This is a mechanic most players discover too late, usually after the event ends.
Spending Diamonds before checking the Exchange Store. The Flower Festival Event Shop contains Diamond-equivalent items purchasable with Festival Petals. Spend your Diamonds on pulls first, then evaluate whether you need to supplement — not the other way around.
Treating the April Fools event as separate. Players who focus only on the Flower Festival and ignore the overlap leave 400+ free Diamonds unclaimed. Both events run simultaneously; both require active claiming.
Hoarding Festival Petals past the event close. Event currency expires. Convert everything before the ~16-day window ends, even if you're buying lower-priority items.
When Free Diamonds Aren't Enough
The 1,140–1,417 free Diamond ceiling covers roughly 7–9 pulls. Hard pity sits at 28 pulls (4,480 Diamonds). If you're targeting a specific SSR from the Flower Festival banner and free methods won't bridge the gap, a targeted top-up makes sense — but only after you've claimed every free source first.
For players comparing options, cheap Idol Party Diamonds top up sites vary significantly in price and security. The 3,280 Diamond pack delivers approximately 74.4 Diamonds per USD with a 20% bonus — the best per-unit value in the standard pack lineup, according to community comparisons.
If you do top up, time it after claiming all free event Diamonds so you know exactly how many pulls you still need. Overspending on a banner you could have hit with free resources is a common and avoidable mistake.
For the best-value recharge during the Flower Festival window, the Idol Party Diamonds recharge best price deal at BitTopup offers secure transactions with fast delivery — useful if you're racing the event deadline.
Frequently Asked Questions
How many free Diamonds can I earn during the Flower Festival? Community testing puts the F2P ceiling at 1,140–1,417 locked Diamonds when all 7 methods are stacked, including the April Fools overlap. The Solo NPC path alone contributes 1,088 of those.
When does the April 2026 Flower Festival end? The event runs approximately 16 days from early April. No official end date was confirmed in available sources — check the in-game event tab countdown for the exact deadline.
Can I max Flower Festival rewards as a free-to-play player? Yes, but it requires daily logins without streak breaks, completing the Solo NPC path consistently, and claiming the April Fools overlap. Miss multiple days and the ceiling drops.
What's the single best use of my time during the event? The Solo NPC path. It yields 1,088 Diamonds — more than all other methods combined. Do it first every session.
Are there active promo codes for April 2026? No confirmed active codes as of April 1, 2026. The last known code expired March 12. Watch official social channels around April 7–10 for potential event drops.
Should I spend my Diamonds during the Flower Festival or save them? Spend on the 10-day SSR banner — that's the primary limited target. Don't pull on standard banners during the event window. And always check the Exchange Store for Diamond-value items before pulling.