Wednesday, September 29, 2010

Black Spined Sea Urchin

COPIAPOA CINEREA

I like the way this plant mimics sea-life, but if you look closely some sea-life and succulents have very similar characteristics. This plant in the collection is about 2" wide. It has changed very little since I purchased it in 2005.

Copiapoa cinerea from the coastal areas of South America, where it grows in areas where very little else grows. It's a very drought tolerant species. One of the most admired species of cacti with chalky/white stems covered with wool at the apex, which contrasts well with the sparse, jet-black spines. It is a solitary, or slowly offsetting, globular to columnar cactus. It is an extremely variable species with many forms, sometimes with long spines or others spineless. The white coloration is a waxy coating presumably to prevent dessication in it's extremely dry environment. In cultivation the white waxy bloom is often not produced, revealing a brownish epidermis. An extremely slow growing cactus kept for the beauty of its form. It must be protected from excessive heat and sun in summer, and seems to do best in cultivation with a bit of shade. It requires light but regular waterings in summer, but let the soil mix dry between waterings. Prone to rot if over-watered. Needs good drainage. Keep warm and dry in winter (50°F) to avoid rot. Not highly tolerant of a great deal of frost. (Frost tolerance 32°F)

Wednesday, September 15, 2010

Foxtail, Swan Neck, or Lion's Tail

AGAVE ATTENUATA
This is my favorite Agave, I love the simplicity that this plant has. No spines, no teeth and a wonderful chartreuse color. Native to the plateau of central Mexico, as one of the unarmed agaves its popular as an ornamental plant in gardens where it is warmer and it does not fall below freezing. Agave attenuata is a tropical agave, it is frost sensitive, doesn't like hot sun, and requires more water than the other agave varieties. I have mine out on the patio during the late spring and summer, otherwise it lives in the greenhouse. It is planted in a 16" pot and is about 2 1/2 feet tall. It is very sad but this plant is disappearing out in its natural habitat. It blooms only when the plant is 10 years old or more. The flower stalk is large 7 to 13 feet with yellow-green drooping flowers organized as a raceme. The plant then dies leaving suckers or pups that grow into replacement plants.

USDA hardiness zone 10 to zone 11