Mini pine tree crassula, like its relative jade, is a carefree succulent I've grown for 20+ years. The botanical name, Crassula tetragona, refers to the three-sided shape of the leaves.
As the name implies, stems of this succulent resemble a pine tree. Along upright stalks grow slender, pointed green leaves that curve up slightly and are smaller toward the top. Over time, rooted cuttings may branch, forming a shrub.
Cuttings establish easily. As with most stem succulents, cut off the top few inches and insert cuttings upright in soil.
When planting cuttings, make sure the bands on the trunks (where old leaves once were attached) are buried. From those bands, new roots will form.
It seems less frost tender than jades (Crassula ovata and cultivars). In my garden, mini pine tree plants have been undamaged when temps have dropped into the 20s F. It forms a polite green bush, not too large (2 to 3 feet tall and as wide), with a textural silhouette.
Like jade, it's a great garden filler plant, but is arguably more interesting. Certainly, it's not as common.
Because Crassula tetragona looks like little fir trees, cuttings are a perfect addition to miniature succulent gardens. One example is the Guatemalan mountain scene on pages 122-123 of my book, Designing with Succulents (2nd ed).
Like many succulents, new leaves grow from the tops of the stems and old leaves wither and fall off. Eventually you're left with naked stems topped with clusters of leaves. If you prefer a fuller look, prune once a year to make stems branch. Or if you're a lazy gardener like me, simply stick a metal fish in their midst.
Do you grow this succulent yourself? Have you used it in seasonal displays or in a miniature landscape? Do let us know in the comments below!
Related info on this site
Crassulas are among the easiest, most trouble-free succulents to grow, with one caveat: With few exceptions, they’re frost-tender (tend to be damaged when temperatures drop below 32 degrees F). Shrub varieties are very easy to start from cuttings, and stacked jades will send forth whiskery roots from between their tight leaves—simply snip off the stem and bury in potting soil so that roots are covered (it’s OK to bury a few leaves too). Crassulas, like aloes, also stress beautifully to shades of red, yellow and orange. Give variegated varieties adequate sun or they’ll revert to solid green.