Skip to main content

Winter hardy cactus beds

My first task of the day was to join B... and Al... as we cleaned the outdoor cactus bed at the front door of the greenhouse. I began by removing and rolling the nylon netting, cleaning out the debris stuck in the netting, then carefully rolling up the netting for storage until next Fall. Under the netting, the bed was covered with long pine needles which protect the small cactus plants and yuccas. Many of the Opuntias (O. macrorhiza and O. fragilis) looked to be in fine shape, having survived the winter well. They looked green and healthy. I read that Opuntia fragilis is native to Minnesota. The task took about 3 hours for the three of us to pick away most of the pine needles from around the cacti, quite delicate, knee-bending, and back-stretching work.

I spent 20 minutes tending to the vine bench. There were several vines that had stolons stretching onto neighboring plants. These had to be removed or pruned to prevent the plants from becoming hopelessly entangled.

Finally, I was able to repot the Cotoneaster frigidus tree which I had intended to do last week. This week, Curator J... had sourced a plastic pot large enough for the root ball. Before potting the plant, I had to clean out the pot with the outdoor garden hose located between the buildings. I removed the old pot from the root ball, really ‘tho most of theold plastic pot shattered as I pulled on the edges. It was quite easy to expose the root ball. Once fully exposed, teased away the root fibers and cut off the lower 2 inches of the root ball. This will allow the new roots to find the
new potting soil.

Comments

Popular posts from this blog

A Sensitive Plant and Common Weed

Mimosa pudica, also commonly called the sensitive plant  was a popular houseplant when I was growing up in the 1970s. It was popular for its ability to quicky change shape by folding up its leaves to protect them from herbivore predators. At the slightest touch the plant is able to expell water from special cells in the leaves, changing the shape from frond-like to a stick-form. The plant creeps along the ground, never for than a foot or so in height. In tropical parts of the world this plant is considered and invasive weed. Today, as I was treating plants to remove pests I happened to touch the leaves of a Mimosa pudica , one with a pretty puff-like flower. Sure enough, the leaves all folded up to almost nothing. Mimosa pudica , the sensitive plant Other more routine chores during my four-hour shift at the U of M Conservatory included cleaning three plants of Hibiscus clayi, native to Hawaii. These three plants in particular have suffered repeated infestations with a variety of in...

Bog Monsters

As a layman of botany the idea of carnivorous plants has perplexed me. The capturing and eating of other creatures seems like it ought to be limited to animals, since animals are mobile and plants are not. Almost all plants survive and thrive in the world through photosynthesis. They do not need to feed on animals to survive. But, what about the group of plants that are carnivorous? As stationary plants, why and how do they eat critters? This topic was stimulated by my assignment today at the Conservatory Greenhouse of the University of Minnesota. My task was to clean several large tanks of water filled with aquatic plants. While cleaning the tanks I realized many of the plants were classified as carnivorous . What is it about the aquatic environment that causes plants to eat - in effect - other creatures? The short answer is carnivorous plants evolved in nutrient-poor settings such as pond water which is naturally low in the amount of nitrogen needed to synthesize proteins. To compens...

Autumn Inside the Greenhouse

I felt the firm grip of fall as I walked the half-mile from the parking lot to the Conservatory Greenhouse at the University of Minnesota, where I volunteer. The temperature outside was in the 30s, and the wind whipped at my face. Yesterday there had been snow flurries.  In stark contrast to the outside world, the greenhouse climate was quite different. Part of the greenhouse is maintained at near-tropical temperatures. But other sections of the greenhouse are kept significantly cooler to support plants that have evolved in seasonal climates. Although indoors, autumn has arrived here too. The sunlight dims, and the nights grow long. Inside these cool greenhouse rooms the plants shed their leaves and virtually cease growth for the winter months, just as they would outdoors.  Part of my assignment for today included the pruning of yellowing and brown leaves. Removing the dead foliage from the plants and the floors helps to reduce the overall risk of mold and other pests affectin...