Polylectic: Xylocopa violacea forages principally at Fabaceae and Lamiaceae flowers, with a marked preference for the genera Lavandula, Salvia (Lamiaceae) and Lathyrus and Wisteria (Fabaceae) (M. Terzo).
Mavromoustakis (1948; 1952) reports visitation to Myrtus communis (Myrtaceae); Amygdalus communis (Rosaceae); Vicia sp., Astragalus lusitanicus (Fabaceae); Thymelea hirsuta (Thymeleaceae); Asphodelus ramosus microcarpus (Asphodelaceae) in Cyprus
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