Tara cacalaco

A showstopper that lights up the winter garden with spikes of fragrant yellow flowers when most trees are dormant.
Frost-sensitive, hardy to about 20-25°F and best in low desert; hard freeze damages flowers and foliage, so protect young trees.
AMWUA Notes
Low water; valued for its rare fragrant winter bloom.
Deep-soak every two weeks in summer and less in winter; deep infrequent watering.
Prune after the winter bloom to shape; wear heavy gloves for the recurved thorns (or plant the thornless Smoothie cultivar) and train to a single or multi-trunk form.
A light spring feeding supports bloom.
Essentially pest-free.
Showy fragrant yellow flower spikes in late fall and winter when little else blooms; evergreen in mild winters with large flat pods.
Well-draining rocky or decomposed-granite soil; tolerates caliche and alkaline pH 7.5–8.5
Needs well-drained soil.
Low feeder.
Grown from scarified seed; thornless Smoothie form propagated to stay true
15–20 ft
Non-aggressive roots; keep the recurved thorns and large pods back from pools and paths
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Data from 2024 AMWUA “Landscape Plants for the Arizona Desert” guide.