Fruit and Spice Park to stay an active garden club member and develop insights on the different fruits that should be planted until she passed away in 1979. In memory of her and Preston B. Bird, South Date County renamed the Redland Fruit and Spice Park to the Preston B. Bird & Mary Heinlein Fruit and Spice Park in 1980. The park contains more than 500 varieties of fruits, nuts, and spice trees. It also includes more than 80 banana trees, 160 varieties of mango trees, more than 40 varieties of grape trees, and 70 varieties of bamboo trees. It also features guava, jackfruit,
Palm wine the sap to prevent it from fermenting. "Neera", similar to fruit-juice products. is relatively rich in potassium. In India, palm wine or toddy is served as either "neera" or "pathaneer" (a sweet, non-alcoholic beverage derived from fresh sap) or "kallu" (a sour beverage made from fermented sap, but not as strong as wine). Palm sap contains natural yeasts, which perform the fermentation of glucose to alcohol, as well as acetobacter, which subsequently converts the alcohol to acetic acid (vinegar). Optimal consumption time is one day after tapping, when the vinegar content is minimal; beyond this time, it becomes increasingly sour.