CryptoCrops
What is Ruby Rhubarb?
Ruby Rhubarb is a rare, overnight-cadence permanent seed in the berry family. One owned copy supports one simultaneous planting. Harvesting returns that copy to availability; it does not consume the seed.
| Property | Value |
|---|---|
| Rarity | Rare |
| Acquisition | 80,000 Farm Coins |
| Base growing time | 12h |
| Base HP per produce | 3,564 |
| Base HP/hour per plot | 297 |
| Weather affinity | Cool Front (+20%) |
| Generation | 1 |
| Seed level cap | 10 |
| Mastery cap | 20 |
| Season | Not restricted to a named Harvest Pass |
Planting and harvesting explains available seed copies, timers and freshness. Seed upgrades and Crop Mastery are separate systems.
Where to get it
Buy additional copies in the Farm Coin Shop. Find Ruby Rhubarb in the seed list (use its name or rarity filter), then choose Buy copy and confirm. One permanent copy costs 80,000 Farm Coins. Buying a copy is different from paying to upgrade its level.
Once acquired, look for this seed on Seeds or in an empty plot’s planting menu. If all copies are planted, wait for a harvest or obtain another copy; produce in the Barn is not a seed copy. All item sources explains the different shops and reward routes.
Seed levels and exact upgrade prices
“Cost to reach” is the one-step purchase from the preceding level; Level 1 is the starting state. Cumulative cost excludes buying the seed. HP/hour assumes instant replanting, one produce per harvest, no mastery, no matching weather, and no building or companion effects. The farm-level requirement applies to purchasing that level.
← Scroll sideways to see every column →
| Level | Cost to reach (coins) | Cumulative coins | HP each | Growing time | HP/hour | Farm level required |
|---|---|---|---|---|---|---|
| 1 | 0 | 0 | 3,564 | 12h | 297 | 1 |
| 2 | 2,000 | 2,000 | 3,777 | 11h 45m 36s | 321.1735 | 1 |
| 3 | 2,800 | 4,800 | 3,991 | 11h 31m 12s | 346.441 | 2 |
| 4 | 3,920 | 8,720 | 4,205 | 11h 16m 48s | 372.7837 | 3 |
| 5 | 5,490 | 14,210 | 4,419 | 11h 2m 24s | 400.2717 | 4 |
| 6 | 7,690 | 21,900 | 4,633 | 10h 48m | 428.9815 | 5 |
| 7 | 10,760 | 32,660 | 4,847 | 10h 33m 36s | 458.9962 | 6 |
| 8 | 15,060 | 47,720 | 5,060 | 10h 19m 12s | 490.3101 | 7 |
| 9 | 21,090 | 68,810 | 5,274 | 10h 4m 48s | 523.2143 | 8 |
| 10 | 29,520 | 98,330 | 5,488 | 9h 50m 24s | 557.7236 | 9 |
Mastery requirements and points
These are raw harvest-equivalent requirements without Greenhouse, Supplier or companion progress. Mastery adds points from the seed’s original base HP, not from the upgraded level value. The percentage column describes that original base; integer rounding can make the exact points slightly higher.
← Scroll sideways to see every column →
| Mastery level | Additional progress | Total progress | Added HP each | Base-point bonus |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0% |
| 1 | 3 | 3 | 72 | 2% |
| 2 | 5 | 8 | 143 | 4% |
| 3 | 7 | 15 | 214 | 6% |
| 4 | 10 | 25 | 286 | 8% |
| 5 | 15 | 40 | 357 | 10% |
| 6 | 23 | 63 | 428 | 12% |
| 7 | 34 | 97 | 499 | 14% |
| 8 | 51 | 148 | 571 | 16% |
| 9 | 77 | 225 | 642 | 18% |
| 10 | 115 | 340 | 713 | 20% |
| 11 | 173 | 513 | 785 | 22% |
| 12 | 259 | 772 | 856 | 24% |
| 13 | 389 | 1,161 | 927 | 26% |
| 14 | 584 | 1,745 | 998 | 28% |
| 15 | 876 | 2,621 | 1,070 | 30% |
| 16 | 1,314 | 3,935 | 1,141 | 32% |
| 17 | 1,971 | 5,906 | 1,212 | 34% |
| 18 | 2,956 | 8,862 | 1,284 | 36% |
| 19 | 4,434 | 13,296 | 1,355 | 38% |
| 20 | 6,651 | 19,947 | 1,426 | 40% |
A clearly defined maximum-seed example
← Scroll sideways to see every column →
| Scenario | HP each | Time | HP/hour |
|---|---|---|---|
| Level 10, Mastery 20, matching weather; no buildings/companions, Level 1 plot | 8,296 | 9h 50m 24s | 843.0894 |
This is not the maximum possible farm output. Plot yield, pond reductions, Windmill strength, active companions, late harvesting, fertilizer and downtime change actual results. Harvest Point calculations explains the rounding and order of operations.
Common questions
Why is inventory worth less than the seed card? An older crop retains its planting-time stats and can lose value if harvested after its Perfect Harvest window. Inventory shows its recorded HP per item. A new seed upgrade does not retroactively alter an already growing crop.
Does a higher-yield plot give extra seed copies? No. It gives extra produce. One crop harvest still advances base mastery once, regardless of how many produce items it yields.