Thelocactus panarottoanusFlowers: yellow. Flowering time: Spring. Watering: Water regularly in summer, but do not overwater. Keep dry with ample airflow in winter. Care must be taken with watering as they tend to become swollen and untidy in growth habit if given too much water and shade.Hardiness: Reputedly sensitive to frost, but less so if kept on the dry side prior to, and during, cold weather (hardy to -7° C for short periods). However, some warmth throughout the year will increase the grower's success (minimum 5° to 8°C during rest season). Exposition: Outside bright sun, filtered sunlight or afternoon shade, inside it needs bright light, and some direct sun. Subject to sunburn if exposed to direct sun for too long. Tends to bronze in strong light, which encourages flowering and heavy wool and spine production. Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz
