In Kate Greenaway's Language of Flowers, the entry for Allspice reads: Compassion.
A symbolic entry, not a recipe
Allspice appears as a plant-name entry with an emotional association. Reading it here is a matter of symbolism, not a recommendation to use a spice, scent or preparation for a particular purpose. Keep those subjects separate.
Compassion is best expressed through attention to the recipient's circumstances. A short note offering practical help can make the intended meaning clear. Avoid suggesting that the historical association proves allspice was customarily exchanged for every sympathetic occasion.
FAQ
Does the dictionary explain how people used allspice gifts?
This entry supplies a meaning; it does not by itself document a specific gifting practice.
Source
Kate Greenaway: Language of Flowers, plant-to-meaning entries