 |
| Pineapple Sage (Salvia elegans) is a favorite of hummingbirds and bees |
In a previous post I wrote that by adopting certain
gardening practices you can take advantage of “ecosystem services”, which
provide pest control, healthy soil, thriving pollinators, and more. The goal is
to strive for a balanced system where natural processes are encouraged and
thrive.
Why bother? In a healthy garden diseases and pests are minimized and you are contributing to the health of our environment overall. Here are my favorite tips for creating a thriving ecosystem in your garden.
The Basics: Food, Shelter, Water
To keep it simple think of it this way: an ecosystem is made up of living things and all living things need the basics: food, shelter (a home, i.e., habitat) and water. In my garden a
combination of California natives, ornamental plants (non-natives), and edibles
make up a triad that buzzes with life. The native plants encourage wild
pollinators and provide habitat and food. A careful selection of water-wise ornamental plants (a must in California) do the same. Edible plants are a diverse group that includes trees, herbs, perennials of many types, and annuals, which include many of our vegetables. In an ecosystem these plants have multiple roles.
 |
| Scarlet Runner Beans have edible flowers that bees love |
Traditional Lawn Centered Gardens are Low on Diversity
Most traditionally designed gardens in urban areas do not have all of the three components above. The typical lawn-centered garden that is overly manicured with nary a leaf out of place is generally not very biologically diverse. Urban and suburban gardens are often designed to minimize leaf litter and emphasize a significant monoculture of lawn space. All lawns are not necessarily bad, it's the practice of using weedkillers and synthetic fertilizers that do the most harm to the ecosystem, in addition to wasting copious amounts of precious water.
Furthermore, the flowering plants in these traditional gardens are usually not allowed to form seeds, and they aren't selected for their value as food for wildlife. In fact, some hybridized flowers don't produce pollen (sterile hybrids), which is considered a messy drawback for cut flowers brought into the house!
In short, the traditionally landscaped garden is low on diversity, and a healthy ecosystem is just the opposite.
The Big Three: Edibles, Natives and Ornamentals
In my garden, a combination of California natives, ornamental
plants (non-natives), and edibles make up a triad that buzzes with life. I
didn’t follow a formula to arrive at this combination- it happened naturally
during the process of redesigning our yards. The native plants encourage wild
pollinators and other beneficial insects, and provide habitat and food. A careful selection of water-wise ornamental
plants (a must in California) do the same, as do edible plants.
 |
| Chamomile is a lovely ground cover with a delicate apple scent |
Among my edible plants I’ve included a variety of perennial
culinary herbs that insects love. These herbs have low water requirements:
oregano, sweet marjoram, sage, rosemary, winter savory, lovage and different thymes. Allowing them to flower is critical. Not only do they attract pollinators, they are essential for cooking (the flowers are edible too), and can
be cut back periodically after flowering to renew their foliage. With these attributes they are popular
in gardens for Mediterranean climates like ours in the San Francisco Bay Area.
Herbs are planted around my raised vegetable beds as permanent companions to seasonal vegetables to maximize pollination and bring in beneficial insects.
 |
| Flowering herbs and edibles ensure that my front yard is buzzing with life |
Trees and Shrubs
A mature tree is extremely valuable and not readily replaceable. They provide us with numerous benefits that we take for granted at our peril. A mature tree is an entire ecosystem that contributes (at a minimum) habitat for wildlife, shade, food, organic matter through leaf litter that feeds the soil as it decomposes, they transpire moisture into the surrounding air to regulate the local temperature, and their extensive root systems are part of the ecology of the soil food web.
In keeping with my strategy of using natives, ornamentals and edibles, here are the trees in my garden: avocado, Meyer Lemon, a Blood Orange, Pomegranate, Santa Rosa Plum, a Pluot, a multigrafted apple, California Buckeye (Aesculus californica), Flannel Bush (Fremontodendron californicum), Coast Live Oak (Quercus agrifolia), and Crepe Myrtle (Lagerstroemia indica).
Our shrubs provide a dense screen along our backyard fence and they are a favorite nesting place for local birds. They enjoy foraging on the ground where wood chips have replaced the lawns, and I provide water in two birdbaths for them.
 |
| A Morro Blood Orange |
