Retama

Retama sphaerocarpa

ShrubPlacenta
Nitrogen fixer
Retama (Retama sphaerocarpa) — syntropic agroforestry species

A tough desert broom that fixes nitrogen and shades bare Iberian steppe with almost no water — a slow but steady nurse plant for harsher, drier lines.

Tolerances & traits

Strata
Shrub
Lifecycle
Placenta
Soil preference
Sandy, Rocky
Soil pH range
6 – 8.5
Min. temperature
-10°C
Min. rainfall
200 mm/year
Wind tolerance
High
Frost tolerance
Medium
Growth rate
Medium
Irrigation needed
Low

How to manage it

Deep-rooted nitrogen-fixing pioneer for arid, degraded ground; its sparse green stems give light shade for nurse-planting longer-lived species.

Watch out for

Corrected common name from 'Yellow broom' (that's Cytisus) to Retama. Seeds contain toxic alkaloids; dry stems are highly flammable; listed as invasive/noxious outside its native range (e.g. California, Australia).

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