Astrophytum asterias 'Ooibo Kabuto'
Astrophytum asterias 'Ooibo Kabuto' is very similar to the normal form of Astrophytum asterias, but while A. asterias has small, scarcely woolly areoles, A. asterias 'Ooibo Kabuto' has very large, woolly areoles. The color of the wool varies from pure white to pastel, yellowish, orangish or brownish depending on the clone.
USDA hardiness zones 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).
How to Grow and Care
Astrophytums are not vigorous plants and they require a lot of patience to reach their full potential. Keep regularly watering and feeding them during the growing season and repot annually to give them space to develop. They need a temperate, dry winter as well and make sure not to overwater them to avoid rotting their roots. If given sufficient care, they will develop marvelous flowers once they reach maturity. Watch out for common cactus pests like aphids and scale, as well. These can often be taken care of by a good eco-friendly pesticide or simply wiped away with cloth.
Repot regularly to help them develop. Astrophytums should be repotted at the beginning of the growing season for best results, allowing them to grow into the impressive specimens for which the genus is known. Protect your hands before repotting due to their stiff spikes and lift the plant out all at once, then replace in a larger pot and backfill with soil. Don't overwater or overfeed newly repotted cacti, as disturbances can be hard on them.
Learn more at How to Grow and Care for Astrophytum.
Astrophytum asterias 'Ooibo Kabuto' is a Japanese cultivar of Astrophytum asterias.
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