Turbinicarpus valdezianus var. albiflorus (Pazout) M.Zachar, R.Staník, A.Lux & I.Dráb
Turbinicarpus valdezianus var. albiflorus is a dwarf cactus with a globular, usually solitary stem completely divided into angled tubercles and obscured by dense spines. The stem grows up to 2 inches (5 cm) tall and up to 0.8 inches (2 cm) in diameter. It has 30 or more distinctive white feathery radial spines per areole. They spread out horizontally, forming small "umbrellas" on the tips of the tubercles. This variety lacks central spines. Flowers are pure white with yellow stamen and white stigma.
USDA hardiness zones 9b to 11b: from 25 °F (−3.9 °C) to 50 °F (+10 °C).
How to Grow and Care
Turbinicarpus prefer to be in a well-ventilated position in full sun to maintain a good body color and spinal development. The golden rule when it comes to watering is "never water when the soil is still damp." This is the one error that will certainly kill any plant. Watering should commence in the spring, depending upon the weather conditions at the time. The plants should initially be given a light spray to gently encourage them into growth.
These cacti can withstand high summer temperatures and benefit, providing accompanied by good ventilation. Do not be tempted to overcrowd the plants, and they will be far happier with a little space to allow the air to circulate. Winter temperatures can be set as low at 44 to 46 °F (7 to 8 °C). Indeed the plants need these low temperatures to ensure a sustained dormant period resulting in good growth and flowering the following growing season.
Learn more at How to Grow and Care for Turbinicarpus.
This variety is native to Mexico (Matehuala, San Luis Potosí).
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