Diseases Archives - Indiana Yard and Garden - Purdue Consumer HorticulturePurdue University Indiana Yard and Garden

Category: Diseases

Larch Needle Blight/White Ash Woes/Top-setting Onions
In the Grow (Q & A)

Q. I have noticed lately that our three big, lovely larches are losing needles on their bottom half. The needles have a banded pattern of color, and I fear larch needle blight. How can I confirm or reject this hypothesis? Is there anything we can do to treat them? – JC A. Specific diagnosis will require more than just these photos. I recommend sending samples of your trees to the Purdue Plant and Pest Diagnostic…Read more about Larch Needle Blight/White Ash Woes/Top-setting Onions[Read More]

Question and Answer
In the Grow (Q & A)

Q. Could you tell me what kind of weed is creeping through my lawn and flowerbeds? It has scalloped edges on the leaves and pretty blue flowers. The leaves have a strong smell. I have tried all kinds of weed killer on it; I think it makes it grow! A. You and most every gardener in Indiana are doing battle with the common perennial weed called ground ivy, aka creeping Charlie, a member of the…Read more about Question and Answer[Read More]

Question and Answer
In the Grow (Q & A)

Q. I have a lilac bush that I started from a “slip” from my sister several years ago that has never bloomed. It is growing leaves and is beautiful, but no blooms. What do I need to do? A. There are a number of reasons why a plant might fail to bloom. The most common factors are plant age, sunlight, plant nutrition, winter temperatures and improper pruning. You didn’t indicate how many years ago you…Read more about Question and Answer[Read More]