GFE is a teaching and demonstration garden, so what happens to the vegetables in our raised beds and fruits from our orchards when it’s ready to harvest? Learn more about our donation efforts.

At GFE, our south orchard is full of Oxalis pes-caprae, otherwise known as sour grass. This horrible weed originated in South Africa in a climate so similar to ours that it has gone crazy in California, invading everywhere. It’s bright yellow flower and clover-like leaves can be found on roadsides, in restored or disturbed natural areas, parks and gardens. It is relentless and it never sleeps. Many a gardener has spent hours weeding this pest, only to come back a week later and find it fully re-established. So what can we do?

Some native plants can be mixed in with other plants requiring summer water, but most can not. This is called the garden tolerance of the native plant. Most native plants have poor garden tolerance, which just means they will not thrive if exposed to normal garden conditions like rich soil, fertilization, and summer irrigation. They may even die.