blood orange disease

QuestionI have a blood orange tree, which is about5 years old & beginning to produce some good fruit. The leaves on the tree are curling up & drooping badly, then dropping off. Can you help to fix whatever is going

Robellini palms - brown shoots, thinning shoots

QuestionI have 2 double robellinis around my pool with some fox & christmas palms and ever since the robellinis were planted they seemed a little on the thin side with respect to the quantity of new shoots and they

crop rotation

QuestionWhy is it necessary to rotate crops on a farm when in nature the same plants keep coming up year after year in the same locations? AnswerHi Gene..the best way to answer this question is plants that keep com

craape myrtles

QuestionI need to know why my crape myrtles leaves are turning black, and what can i do to fix this problem. thanks kevin AnswerSounds like aphids. These insect suck the plant juices for the plant and secrete a sub

Dying Indoor Palm

QuestionI have a new indoor palm tree. It stays in my bedroom where it does not get much sunlight. I sat it on my porch for an afternoon due to it not receiving much sunlight and it appeared that the lea

black spot on mangoe tree

Questionflowers on tree keep dying each year.srayed with mancozeb weekly. doesnt seem to work.noticed a lot of black spots on tree branches.could you please help AnswerHi Could you check the spots on the trunk wit

Wilts??

QuestionQUESTION: I need help, please! I have a Black Jack Sedum that is wilting from the ground up. The base of the stems are turning brown and the damage is creeping up toward the top. Obviously moisture is not al

Wax Myrtles

Question Some of my wax myrtles have a rust colored growth on the trunk. When you touch the growth it disperses like a fine powder. Some sort of spore thing I guess. The growth appears to have a fi

Honeysuckle Plant

QuestionQUESTION: I have a new Honeysuckle Plant (about 6 wks. old) which was a gift from a friend as a memorial to my sister, so its VERY special to me. Its just coming into bloom, but the lower leaves are ye

magnolia elizabeth plant

QuestionI just purchased this plant its about 5ft tall and bushy. The leaves are curled and spotted,like water spots.The flowers turn brown and fall off without opening. However is has an abundance of new growth. Wh

crimson red maple tree

QuestionWhat kind of insect control can i use for what looks like scale on the bark? Also when the scale is taken off it has what looks like a bug was in it!Also doesnt these trees get spider mites easy? Please let

Alder tree problem

QuestionThere is a series of holes, about one-quarter inch in diameter, that form a ring around the trunk. The ring is about 15 feet from the base. There is also a reddish sap that comes from the area of

Hisibicus diseases

QuestionI have a out doors plant that did good last year but this year we are losing several stems. They are just drying up. Any thoughts AnswerDepends on your geographic location. The plant could have suffer

Cypress tree dead spot

QuestionI have a row of 15 Italian cypress trees about 12 ft tall. They are kept manicured, but the end tree is getting a dead zone on the East side of the tree from the ground up about 3 feet. Our gardener told us

Fruitless Mulberry disease

QuestionI have a fruitless Mulberry Tree in my front yard in Northern CA, Santa Clara. The tree has to be close to 30 years old. I have never had any problems with disease or insects. There is no c

Black spots and dried leaves Aspen tree

QuestionI have 2 single quaking aspens and a group of 3. The smallest single tree has dried leaves that have black blotches on them. It has not been wet or cool in my area - just the opposite with the fi

cure for verticillium wilt

QuestionHello David, How can I treat a 7 year old Japanese Pistachio tree that has had verticillium wilt for two years now? The leaves turn yellow, then curl to brown, then fall off. Only the twig is lef

victoria plum trees

QuestionHi David, Please can you help me, I have 2 year old Victoria plum that has plenty of fruit and looks healthy, but every plum I have tried so far (about 15) all have very small maggots in them, do you know ho

Rose bushes turning black

QuestionRecently I purchased a few rose bushes on clearance sale at a local store. They looked kinda bad, but thought all they needed was some TLC. The stems are turning black & the leaves are drying out. Some of th

oak tree fungal infection

QuestionQUESTION: have a large legacy broad leaf oak tree in distress. tree has girth of at least 10 feet. lowest limbs about 20 feet above ground are dying. recently had fungal bloom about 3 inche