At certain points during the Dragon Ball Z-serie, the group receives a bag of Senzu Beans from Korin. Senzu Beans are very nutritious and heal wounds, sometimes even saving people from life-threatening injuries.
Knowing that, it would be stupid not to have extra Senzu Beans on hand. Unfortunately, the only one who's able to grow them is Korin.
Is there a reason why nobody else can grow Senzu Beans, other than difficulty? I'd imagine regular people can learn to grow beans, even if they're magical.