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Coffee grounds and soil trial

Popular gardening advice touts the benefits of coffee grounds for acid loving plants, as a slug repellant and soil amendment. Little research based information is available to back up many of these claims. From November 2008 to September 2009 OSU Extension Service Master Gardener Compost Specialists in Lane County conducted an observational trial to see what the effect coffee grounds had on soil pH and nitrogen content when incorporated into soil.

Jun 2009 | Educational Document

Would my garden benefit from a java jolt?

Q: We hear about adding coffee grounds to garden soil. What are the benefits?

A: View answer | View all featured questions

Are madrone trees mean?

Q: I have a small grove of Madrones behind my house. I have put a couple of annual beds under them but nothing seems to grow under them. I have looked all over the net to no avail on this issue. I did amend the soil in the beds. I also planted a few Dogwood trees under them from tiny sticks. The trees grew last summer but then the leaves started browning at the tips and curling up. I was watering the trees every two to three days during summer. What am I doing wrong?

A: View answer | View all featured questions

Native madrones are special to the Northwest

There are probably few plants that are more strongly identified with this area or are held in greater affection than the madrone tree.

Jan 27, 2006 | News Story

Coffee Grounds and Composting

Coffee grounds are a great addition to the garden and compost pile. Help to recycle this great organic resource and reduce the amount of organics going to the landfill!

Jun 2018 | Article

Use Caution When Irrigating Oaks and Madrones

Excessive summer irrigation of oak and madrone trees may promote fungal diseases such as the oak root fungus (aka armillaria root disease) and crown rot.

Jun 2018 | Article

What’s Wrong With My Madrone?

This article briefly discusses the most prevalent madrone disease problems, then offers a broader perspective on the health of this southern Oregon native.

Max Bennett, Dave Shaw | Nov 2006 | Article