Gardening and landscaping involves planning before getting your hands in the soil.
Last week’s column, which was about renovating a garden, recommended four preparatory actions:
1 Draw a diagram of the property.
2 Decide on basic design concepts.
3 Establish objectives for the finished landscape.
4 Set priorities for development.
Once the gardener has completed those actions, he or she still has additional tasks to complete. Those tasks are the focus of this week’s column.
Remove unwanted plants A neglected garden probably motivated the landscape renovation project. Neglect often includes trees and woody shrubs that have outgrown their space, lack a role in the new design or are unhealthy. In some cases, this task will require contracting with an arborist or laborers. Check local ordinances before removing trees.
All herbaceous plants that are unwanted are defined as weeds. These include garden plants and grasses as well as common weeds. Pull or dig larger plants, then remove grasses and weeds efficiently with chemical-free solarization. This method covers the target area with clear plastic so the sun raises the temperature of the soil, killing weeds, pathogens, nematodes and insects. For details, see the University of California’s free publication “Soil Solarization for Gardens Landscapes,” available at www.ipm.ucdavis.edu (search for Pest Notes 747145).
Removing weed plants with a do-it-yourself approach could be time-consuming and frustrating. Consider contracted services to get the job done quickly and thoroughly.
Remove unwanted hardscape If your garden includes paving, e.g., sidewalk, patio, walls or outbuildings that are not included in the new design, remove them to free your progress. Again, consider contracted services to speed the work. This would be a good time to invite a disinterested friend to comment on your garden accessory collection, and to remove items that are no longer assets.
Analyze soil structure The gardener should know the structure of the garden’s soil. An ideal soil would have 45 percent minerals (sand, clay, silt), 5 percent organic material (plant and animal), 25 percent air and 25 percent water.
There are various combinations of sand, clay and silt that might be found in a garden. The mineral content of ideal garden soil, called loam, should be about 40 percent sand, 40 percent silt and 20 percent clay. For a simple method to analyze your garden’s soil texture, visit ucanr.edu and search for “Garden Good Guys — Soil.”
Notice that these preparations do not include buying plants! For many gardeners, the primary strategy for improving the landscape is to buy plants. That approach, without an overall plan, weakens the landscape design and wastes time and money.
Tom Karwin is a UC Master Gardener and vice president of the Friends of the UC Santa Cruz Arboretum. He gardens in Santa Cruz. Send feedback to gardening@karwin.com. Visit ongardening.com for more on garden renovation.
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