Puya is a large genus consisting of 170 species of South American terrestrial bromeliads in the Bromeliaceae family. They include the largest of all bromeliads, some species growing to about 6 meters. They are cultivated in gardens as shrubs. The leaves stand out boldly from a basal rosette and they often have hollow stems. Large blue, purple or yellow flowers are held on unbranched spikes or in dense panicles. The fruit are capsules that enclose winged seeds.

These plants can grow in a wide range of soils provided they are well-drained and prefer a sunny position. As with all members of the bromeliad family, keep them away from footpaths because the leaves bear sharp spines along the margins. Prune to remove damaged foliage and propagate by division of offsets or from seed. They grow well in raised garden beds, rockeries and in large pots.

Puya alpestris, commonly known as Andean Puya or Sapphire Tower, is a flowering plant native to the high-altitude regions of the Andes Mountains in South America known for its striking, spiky appearance. It thrives in the harsh, cool climates of the mountain slopes, where it is well-adapted to survive extreme conditions such as low temperatures and high UV radiation. The plant is characterized by its rosette of stiff, spiny leaves and the spectacular blue or greenish flowers that emerge from tall, branching inflorescences. This unique species has become a sought-after ornamental plant for gardens and botanical collections worldwide, valued for its architectural beauty and resilience. Puya alpestris not only plays a role in its native ecosystem but also draws interest for its ecological significance and its ability to survive in tough environments.