Japanese Allspice (Wintersweet)Also known as Wintersweet, this plant is a true rarity in the world of botanicals, as it shows its beauty at a time when most other plants are dormant. Cold temperatures (usually November February in our area) bring on gorgeous yellow blooms with red or purple accents and a fragrance you'll love! Japanese Allspice can be grown as a large deciduous shrub or tree formed into a statement tree.