Origin and Habitat: Garden selected cultivar.

• Fenestraria rhopalophylla subs. aurantiaca cv. Fireworth

• Fenestraria rhopalophylla (Schltr. & Diels) N.E.Br.
• Fenestraria aurantiaca f. rhopalophylla (Schltr. & Diels) G.D.Rowley
• Mesembryanthemum rhopalophyllum Schltr. & Diels

• Fenestraria rhopalophylla subs. aurantiaca (N.E.Br.) H.E.K.Hartmann
• Fenestraria aurantiaca N.E.Br.

• Fenestraria rhopalophylla subs. aurantiaca cv. Fireworth

Description: has very large orange flowers, larger and more intensely coloured than in the regular fenestrarias.

Cultivation and Propagation: They are relatively easy to grow.
Soil: They prefer sandy, mineral-rich soil and require a very good drainage and protection from excessive water.
Fertilizer: Be careful not to apply too much fertilizer.
Watering: They require little water otherwise its epidermis breaks (resulting in unsightly scars). They need light sporadic watering during their winter growing period and require only very light sprinkling in summer as they are extremely rot prone if kept too moist when the heat turns off their growth cycle. Water regularly in spring and autumn, soak the compost fully but allow it to dry out perfectly between waterings. Nearly all problems occur as a result of overwatering and poor ventilation especially when weather conditions are dull and cool or very humid.
Exposure: They do well in full blazing sun, but keep cool and shaded in summer.
Hardiness: Hardy to -4°C.
Maintenance: Avoid to repot frequently. This plant may stay in the same pot for many years. Plants grown in larger containers have frequently relatively poor flowers. They might improve when the plants are given their own, small individual pots.
Propagation: They can be reproduced both by cuttings and seeds. Take the cutting from a grown-up mother plant. Each cutting must contain one or more heads along with a fraction of root.