At the exit, the shop offers a free tasting: banana liqueur (sweet, 20°, treacherous on an empty stomach), jam, plátano chips, and homemade banana cake. The two ladies who run the museum are passionate and take the time to explain each product. You often leave with a bag — the banana-rum jam is the best edible souvenir from Tenerife, and artisanal banana soaps make original gifts. If you speak a little Spanish, the visit becomes three times more interesting.
The Casa del Plátano is 100 metres from the Drago Milenario — the thousand-year-old dragon tree, the most famous tree in the Canaries (800-1000 years according to estimates). The perfect combo for a half-day: Drago in the morning (paid park ~€5, or free view from the San Marcos church terrace), Casa del Plátano next, then the Mariposario del Drago (butterfly garden, just opposite the Drago). Lunch on the Plaza de la Constitución — the bars serve decent tapas and local wine. If you still have energy, the Cueva del Viento (volcanic tube of approximately 18 km, one of Europe's longest) is 10 minutes' drive away — booking required.