willow tree dying

QuestionWhat would cause a willow tree that is about 15 ft to suddenly have leaves through the middle of the tree turn yellow through summer and one branch have green leaves? The top of the tree has no leaves.

split bark on magnolia tree

QuestionWe have a 6 magnolia tree with a trunk diameter of about 2. The tree was moved about a year and a half ago and was doing well, with large leaves (no blossoms this year). However we just noticed t

JonaGold Apple Disease

QuestionI have a Jonagold apple I planted a year ago. It seems to be growing very well - new growth this year about 14 - 18. But, the leaves on the tree are curling up around the spine of the leaf.  

black mildew on Crepe Myrtle

QuestionI live in Southern Alabama and I noticed some of my Crepe Myrtle have black leaves...the whole branch is black...it did flower just fine...but I guess in the last month this tree got some kind of mildew...no

Crepe Myrtle Diseases

QuestionI live in Vacaville, California between San Francisco and Sacramento and have a Crepe Myrtle of unknown age, but over 20 years old. It used to be a normal tree but lately two things have been occurring

Japanese Maple dwarf size when bought.

QuestionWe have had our Japanese Maple for 18 years and never had a problem. I have noticed in the last couple of weeks that it is loosing its under leaves, they are dying and falling off. It has been pl

Forsythia Disease?

QuestionI have 3 dwarf forsythia bushes. The leaves on the ends of the twigs have begun to curl up, turn yellow and then brown. This started a couple of weeks ago from the bottom of the plants and has mo

Is my tree dieing?

QuestionOver the past 2 years our weeping cherry tree has been showing less and less blooms in the spring and less leaves in summer.We pruned several dead branches that have shown no new growth.Last weekend after a

infestation or disease on lemon tree

QuestionWe have a potted lemon tree we purchased 2 years ago and have had a long learning curve with the tree and now it is growing numerous lemons and is flowering very well. We just now discovered a cottony growth

boxwood die back

QuestionQUESTION: I live in Iowa on boarder of area 4,5. 2 years ago I planted boxwood from Chicago land. 5 did not grow at all but did not die.5 grew some . Replaced the 5 that didnt grow last year. The

Our flowering cherry tree has growths on the bottom of its leaves

Question Flowering Cherry tree My dad showed me his flowering cherry tree in our backyard. He said it has been there for 30 or more years. It hasnt had any problems that we know about but it is fairly small. It was

Tiny insects in my Zebras soil

QuestionI have a small Zebra for about 2 months. The leaves have a brown tip, they wilt then fall off. I noticed a necrosis (if I can call it that) of the stem. I actually sloughed off a piece of it. I noticed that

White Birch

QuestionHi We live in MN and we have a White Birch that is loosing its leaves and the limbs look dead on 1 side of the tree. My husband trimmed it in the spring and that sure was a mistake. The liquid ran out of it

Caragana bushes with white leaves.

QuestionOur caragana bushes leaves have a white chalky look to them. They were fine 2 weeks ago, but have turned white now. They have had this in other years also, do you have any idea what this could be? AnswerSou

Locust tree problem?

QuestionHi, We have 3 honey locust trees in our backyard in New Haven County CT. I estimate them to be slightly older than our home so over 20-25 years old. Last spring we had an aphid problem which init

Re disease in mondo grass

QuestionI have a path edging of Mondo Grass which has died. we are on the Central Coast of NSW and subject to plentiful rainfall. However the climate would be referred to as Moderate, with no frosts. Muc

sticky leaves

QuestionHi Dr. Vann, I have a zebra plant for 3 years and recently it started losing leaves and I find a sticky substance on the leaves and surrounding table top it sits on..any idea what this could be and how can

crimson king maple

QuestionIt is august and the leaves on my crimson king maple are turning from red to green and dropping.My neighbor has the same tree and it looks fine. What might be going on? What can I do to correct the problem?

Fruit tree fungus

Question I have several varieties of apple trees. Although they have been planted at least two years I saw one of the new ones with a white powdery substance on its branches. That white powdery substance appears to

New Wisteria plant dying

QuestionDear Steve, I just planted a new Wisteria plant this summer. I love the blooms and I had heard they are a very sturdy plant, even invasive. The plant appeared to be thriving for several months. Now I h