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Hortiscope: Disease, not fertility issue, caused tulip sparsity

Q: I am working on the scale insects on my orange tree. I have been using Bonide systemic for four weeks and also cleaning off the new scales. How long does a systemic killer take to clear up the problem? Is there an advantage to wiping off the scales with rubbing alcohol or is water OK?

NDSU Extension Service, 11/23/2012

Hortiscope: Miniature orchard off to a good start

Q: I planted four honeycrisp, four haroldson and two prairie spy apple trees several years ago. I am interested in information on tree care and basic maintenance because I would like to keep them healthy.

INFORUM, 11/16/2012

Hortiscope: Tree’s problem likely weather, not dog urine

Q: I have three red maple trees that I planted several years ago. They were beautiful before this spring. One did not have a full production of leaves. Now that fall is here, the other two trees have dropped their leaves.

INFORUM, 11/09/2012

Hortiscope: Pruning needs vary depending on plant

Q: Now that we have had frost and are at the end of the growing season, is this the time to trim or prune clematis, honeysuckle and trumpet vines? If so, how much should I trim or prune?

INFORUM, 11/02/2012

Hortiscope: Insects cause of sap issue

Q. We have an old silver maple tree that we have trimmed three times in the past 15 years. The most recent trimming took place earlier this year. This summer, I noticed a lot of sap all over everything on my deck, which is underneath the tree. My husband says he’s seen it do this before, but I have not noticed it before and I am out on the deck more than he is.

INFORUM, 10/25/2012

Hortiscope: Take care of crabgrass problem in the spring

Q: I have a couple of questions related to fall lawn preparation. I have some large areas of crabgrass in my lawn, so I am wondering how I can get rid of it before winter hits. Should I apply Roundup on the plants and then reseed? Is there an easier way to deal with crabgrass?

NDSU Extension Service, 10/18/2012

Hortiscope: Watering, calcium both related to end rot

Q: I read your article about blossom end rot on tomatoes. All the articles I have read say to give the tomatoes some calcium. It does work, so the rot has nothing to do with watering. I figured a man in your job would know better than to say it is the watering.

INFORUM, 10/12/2012

Hortiscope: Get frost blanket for untended pumpkins

Q: I have large pumpkins and a ton of buttercup squash in the garden. We will be going on vacation, so I wonder what temperatures they will tolerate in our absence. Thanks for your time.

INFORUM, 10/05/2012

Hortiscope: Water less in fall

Q: I’m hoping you can help me. I received a huge cymbidium orchid plant that was on the downside of its blooming. There were seven or eight bulbs squeezed into a 7-inch pot.

INFORUM, 09/28/2012

Hortiscope: Check indoor plants for outdoor insects

Q: About a year ago, I received a peace lily. It has done surprisingly well, considering the various opinions I have received on how to keep it healthy. About a week ago, a caterpillar appeared on the underside of one of the leaves.

INFORUM, 09/21/2012

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