This is the Q&A for the Yard and Garden show for April 17, 2015. Yard and Garden Live is a call-in radio show I do on KUTT 99.5 FM from 10-11:30 am and it will run through July 31, 2015. It can also be found on kutt995.com for online listening. If you missed a show or just want to read through the questions, I have written them all in my blog and will continue to do so throughout the season.
Guest Host: Dr. Paul Read, Professor of Horticulture, Viticulture Specialist
1. A Caller wanted to know if this was a good time to transplant rhubarb?
A: Now would be a fine time to transplant rhubarb. If you wanted to harvest from it yet this year, it would be best to wait until the fall to transplant it. Rhubarb should not be harvested from within the first 1-2 years after transplanting to allow the plant to build a good root system before harvesting begins. Make sure that rhubarb is planted in a well-drained location to avoid getting crown rot, a disease that will eventually kill the plant.
2. An email listener wanted identification and control strategies on her plant with purple flowers that is blooming now.
A: This is henbit, a winter annual that is flowering to complete its lifecycle. Because henbit is basically done growing for its lifecycle, it is best to leave it alone and let it die naturally in the next few weeks. The seeds are already in the soil for next year. Henbit is best controlled with a 2,4-D product in the fall. Mark the areas where henbit is found in your lawn this year and spray those areas in the fall. Management also can be achieved by overseeding turf into those areas where henbit is found or planting something else to compete with the henbit.
3. This caller wanted to know how to control clover
A: The best time to control clover would be in the fall with a couple of applications of a 2,4-D product. Applications of this product now can be useful, but will not eliminate the problem altogether. Be sure that when you apply 2,4-D to your landscape to not allow it to drift to any other broadleaf plant, including our trees, shrubs, and perennials. Also, only spray when the temperatures are below 80 degrees Fahrenheit.
4. A gentleman has a lawn that has been neglected for a while that he is struggling to keep turf alive in a full-shade location with poor soil. What can he do to get the turf to live there? Also, in another area of full sun, would dwarf fescue be a good turfgrass choice?
A: Because it is poor soil that had subsoil put on top of the existing soil, it would be best to aerate and add organic matter to try to improve the soil conditions. Full shade is difficult to grow turf in, so it would be best to choose a full shade perennial or groundcover or somehow prune the trees to improve the sunlight for the turf. Dwarf fescue is not a good choice because the root systems are not as deep as the turf-type tall fescues or Kentucky bluegrass.
5. What would be the fruit tree spray schedules for cherry and apple trees?
A: Orchard fruit tree sprays can be applied to both of these types of trees on a 10-14 day interval, while avoiding the blooming period to avoid damage to the pollinators. There are guides to spray schedules from many Universities including one for homeowners from Missouri Extension
6. A caller wanted to know what are some good varieties for pear trees in Nebraska? Does he need multiple species for pollination? How does he mulch these trees?
A: Pear trees are not self-pollinated so you will need to plant 2 different varieties to get fruit. Some good choices for Nebraska would include Luscious, Harrow Delight, Harvest Queen, and Seckel. A mulch ring is necessary to help the tree survive, it should be only 2-3 inches deep.
7. This caller used crabgrass preventer with fertilizer in it a couple of weeks ago and wants to know when he should use his weed and feed? Also, what type of care would he need for shrub roses he just planted this spring?
A: It would be best to just use a 2,4-D product anytime now and wait until the end of May to do another application of straight fertilizer to get through the summer, since he already applied fertilizer with his crabgrass control. The best thing for the roses would be to ensure that they are kept well-watered but not overwatered.
8. A gentleman has Philodendrons and Crotons as houseplants that he has moved outside for the summer. Now the leaves on the Philodendrons are curling up, why is that? Also, what kind of care should be given to the Croton, is misting a good practice for them?
A: These plants are tropical plants that we can grow indoors in our homes. The nights are still too cool for those, which is why the Philodendrons may be having leaf rolling issues. If the weather is predicted to get to the low 40’s to 30’s for the overnight hours, it would be best to bring these plants indoors. The Crotons should be watered properly from the base of the plant to ensure survival. Misting plants leaves the leaves wet which can lead to diseases.
9. What can be done to control ants found in the kitchen?
A: Terro ant baits work the best with the odorous house ant. Also, seal up all cracks and crevices in the foundation and around doors and windows. Clean up plant debris outside the home near where ants are found inside the home to reduce locations where ants may be hiding outdoors.
10. A lady has blackberries that are overgrown. How can she clean them up?
A: Cut out the old stems that are existing and continue to do this at the end of every growing season.
11. This caller has a 30 year-old pear tree that has never produced fruit. She has one pear in her landscape. Why would it not produce fruit?
A: Pears are not self-pollinated. Plant another variety and it should begin to produce fruit.
12. When is the best time to prune a snowball bush?
A: This is a spring blooming shrub, so it is best to prune it immediately after it has finished blooming for the year.
13. This caller wanted to know how to control Dandelions in her yard?
A: 2,4-D products can be used now but will have the best efficacy in the fall. If applied now, ensure that the wind is not blowing and the temperatures are at or below 80 degrees Fahrenheit for the day of application and the 2 days following.
14. This caller has started tomatoes and peppers from seed indoors and they are now becoming tall and spindly. What would cause that and when can they be placed outdoors?
A: They will need more light to avoid becoming tall and spindly. Also, be sure to buy clean and sterile soils for seedling production to avoid problems with Damping Off, a disease common to seedlings. Summer crops can be planted outdoors in the beginning of May, typically Mother’s Day is a good date to plant summer vegetable gardens.