Romanesco

The Romanesco is a multi-harvest, Prismatic crop added during the Beanstalk Event, and that pairing is what makes it one of the more lucrative seeds in its bracket. Prismatic is the highest standard rarity tier, so even before mutations the base sell value is steep, the kind of payout that justifies a dedicated plot rather than a filler slot. With no exact numbers stored here, the rarity alone signals premium cost in and premium return out.

The multi-harvest trait is the multiplier that matters most. A Prismatic crop that yields once is strong; one that regrows and pays out repeatedly turns a single high seed cost into compounding income, which is exactly the profile you want from an event seed you may never be able to buy again. Its typing as Sweet, Leafy and Vegetable also opens broad buff synergy across those three categories.

Reserve the Romanesco for a mid-to-late game garden where you can protect it and let it regrow undisturbed. Stack Rainbow or Gold on it to push each repeat harvest into elite sheckle territory, and treat the limited Beanstalk availability as the real reason to grab it while you can.