Onings Holland Flowerbulbs | 691 followers on LinkedIn. Bulbs unlimited | Onings Holland is a renowned exporter of bulbs and tubers. The Onings family business was established 90 years ago and enjoys a strong reputation for quality and reliability. Besides being a top supplier of lily bulbs, Onings Holland is also a valued supplier of other bulbs and tubers such as tulips, irises, freesias, hyacinths, gladioli and a wide range of miscellaneous bulbs for both growers as well as dry sale purposes.