Dendrobium delacourii is native to Thailand, Myanmar, Vietnam, and Laos and can be found in deciduous forests in bright light but can often grow in full sun. This species requires intermediate to warm temperatures with medium to high humidity and good air movement, it should be given plenty of water for most of the year, however, they do require a dry rest for about a month in winter when it will drop its leaves, recommencing growth in Spring when watering can carefully begin again.
Racemes of flowers arise from the centre of the new growth with each carrying up to 10 fragrant blooms of about 1.5 to 2cms. Petals and sepals are pale greenish-yellow. The lip is also pale greenish-yellow but it has groups of reddish-brown veins on the inside of sidelobes and bright yellow finger-like or club-like projections at the tip. Flowers usually last for several weeks.
Dendrobium delacourii is a miniature species with club-shaped pseudobulbs that are about 3cms tall with the whole plant up to 10cms tall. Plants do well on mounts but can also be grown in a small pot.