plants

How-To: Plant a Rainbow Container

The third installment in my container garden series is a colorful combination using every color in the rainbow. The first container was a dramatic and stylish pairing of dark purple and golden yellows. The second was a modern mix of de-saturated warm and cool colors, and the focus was on pairing textures. This container is […]

I Heart Japanese Maples

I have always treasured Japanese Maples. Long ago I decided that Acer Palmatum were precious and began to covet them, and since then, my feelings have only grown stronger. I live in the redwood forest, where the trees are all evergreens. One reason I’m so attracted to the Japanese Maples is because they are one […]

Queen’s Tears Bromeliad

Queen’s Tears Bromeliad

Billbergia nutans is the most unusual bromeliad I have ever seen. Named Queen’s Tears, this hearty plant is called one of the most commonly grown bromeliads by Wikipedia, but I think she is a rare beauty. I picked up my first Queen’s Tears from a Brazilian at the Sebastopol flea market 8 years ago, and […]

Clematis Vines in the Garden

Clematis is just about my favorite plant. It is a flowering vine, with literally endless variations. It’s a vigorous grower, and can be easily trained to climb trees, trellises, or along a railing. The different types indicate their flowering tendencies and their pruning needs- for instance, some clematis are deciduous, and loose their leaves in […]

Brilliant low-tech soil moisture sensor

Brilliant low-tech soil moisture sensor

Two galvanized nails set in a plug of plaster-of-Paris. That’s it. The Cheap Vegetable Gardener, who created the sensor for an automated grow box project, explains:

Technically a gypsum block measures soil water tension. When the gypsum block is dry it is not possible for electricity to pass between the probes, essentially making the probe an insulator with infinite resistance. As water is added to the problem more electrons can pass between the probes effectively reducing the amount of resistance between the problem to the point when it is fully saturated where the probe has virtually zero resistance. By using this range of values you can determine the amount of water than exists in your soil.

[via Hack a Day]