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Frost Advisory for Northern 1/3 of Arkansas

May 8, 2020
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It is not often that we see this headline in May. The cooler than normal spring has thrown some curve balls at all gardeners across the State. Some of you have had hail, floods, wind gusts, tornado, and now a pending late frost.

In my Fayetteville garden, I have a number of frost tender vegetables up and growing just like this zucchini. I will be covering these tonight to protect them from the expected spotted frost for this region. My okra is having a real hard time. I may have jumped the gun on the okra.
I tried something new in my garden this year. Anemone is a rhizomatous bulb, which I planted last fall. Parsley like foliage appeared early on and now I have a show of red blooms. I’m amazed on how long the stems are and each bloom is open for what seems like a good week. Although anemone can tolerate light frost, I will cover the ones showing color. Also, I will move all my tender houseplants into protection tonight and hope this is the last frost for the season.

Potato Hilling

May 4, 2020
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Potatoes are among the earliest vegetables planted in the garden. Planted early to mid-February through early March in southern Arkansas and early March to early April in northern Arkansas. You will need to mound soil up and around potatoes after they break the surface of the ground. Gradually build up a low ridge of loose soil by hoeing soil towards the plants from both sides. This ridge, may become 4 to 6 inches high and will reduce the number of sunburned (greened) tubers. Additionally, this cultivation will eliminate weeds and aerate the soil which aids in the development of normal shaped potatoes versus when the tubers develop in challenging hard, compacted soil.

This row of potatoes, in my vegetable garden in Fayetteville were planted the last week of March and have been hilled up twice to its current height.

Mulching is usually helpful in growing potatoes. This is the same row which was hilled earlier. The straw mulch helps to conserve moisture and keep weeds under control. Mulch will also keep the soil cooler which aids in maximum tuber production. Before placement of straw, I side dressed with a small amount of fertilize. I used blood meal, approximately 1 tablespoon scattered around each plant. Because I’m between Little Rock and Fayetteville, I plan on putting a drip system in and around these just in case we hit a dry spell. I’m set for a good harvest in June.

Ben Morrison Azalea

April 28, 2020
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One of the first shrubs Marilyn and I planted when we moved to our present home in Fayetteville is this bi-color azalea known as Ben Morrison. This late blooming upright, semi-evergreen rounded shrub, will reach 6 feet tall and wide. In southern Arkansas this plant is evergreen but on the boundary line between zone 6 and 7 where I garden, it loses many of its larger leaves but retains its smaller late season leaves. Ben Morrison’s open airy growth habit fits in well near my front porch shade garden.

Should I Trim or Braid or Do Nothing?

March 16, 2020
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No I’m not doing hair these days. These questions are often asked about this time of year as daffodils and other spring flowering bulbs finish blooming. The answer is quite simple but most often not adhered to. Allow bulb foliage to mature naturally without disturbance. The time required depends on the species. Tulip foliage dies five to six weeks after flowering. Daffodil foliage may persist for 10 to 12 weeks. If the foliage is removed early, the bulbs will be small next year, thus reducing the beauty of the display. Techniques such as braiding the foliage, squashing it or trimming back should not be used. It is acceptable to plant annual bedding plants between the clumps of dying foliage. Contact me, Berni Kurz through this page or at bkurz@uaex.edu if you have any questions.

These daffodils were planted 60 or so years ago at by boyhood home. Several of these clumps are a foot or more across and bloom only on the outer perimeter. As soon as the foliage dies back I will dig the clumps and replant giving bulbs more individual space which will result in more flowers in future years to come.

Calling All Bradford Pears

March 4, 2020
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Blooming Bradford pear trees are a sure sign of early spring in Arkansas. While the blooms are lovely, the trees do not weather well over time. Bradford pears are poorly formed trees with many limbs originating from a central location. This characteristic creates a weak spot in the tree that makes Bradford pears susceptible to storm damage and greatly reduces the potential life span of the trees.

These Bradford pears are on I 630 right of way in Little Rock. The city of Fayetteville is the only town in Arkansas which has put Bradford and other Callary Pears on their do not plant list. You ask why? Bradford pears were believed to be sterile upon their introduction to the United States in the mid 1960’s.  What we now know is, while no two Bradford pears will reproduce among themselves, they do cross pollinate with other pear trees to create a wild type hybrid tree.  The resulting trees create thorny thickets that have many negative impacts on our native tree populations and has a domino effect onto wildlife which depended on the native plants for survival.

This scene of pears coming up in the native landscape, can be found all across Arkansas and all other regions where Bradford Pears have been planted. Now is the time to flag these trees for removal. If you do lose a ‘Bradford’ in your landscape, don’t replace it with a new Bradford or any type of “improved” ornamental pear. The Bradford pear cultivar, other P. calleryana cultivars and P. betulifolia or Asian pear, can hybridize and produce fertile fruit, compounding the invasive problem.

There are better options for landscape trees that are longer living, more suitable for Arkansas, and support wildlife. This picture is of Serviceberry, Amelanchier arborea, which will be in bloom a little later than Bradford Pears. Serviceberry growing in full sun will produce a heavier bloom than shown in this picture. This tree will also bear edible fruit which requires no spraying and little to no pruning. Other good substitutes include: Flowering Dogwood (Cornus florida) and Fringe Tree (Chionanthus virginicus). For more information on invasive plant species, contact your local County Agents office or me Berni Kurz at bkurz@uaex.edu

Spring has Sprung in Southern Arkansas

March 2, 2020
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We live in a small State, but we have a broad range of temperature from the northern Arkansas to the southern border. This is more apparent in the spring months when we as gardeners want to get a jump on the gardening season. The last average frost in Southeast Arkansas typically occurs on March 18 and in some northern tier counties the last frost is a month later, April 15. Gardeners in Southern Arkansas are busy planting spring gardens right now while Northern Arkansas gardeners are chomping at the bits.

Source: National Weather Service

Keep in mind, when planting frost sensitive plants before the last frost, you will need to provide frost protection on those cold frosty nights. Also, plants like peppers, if planted now, and you are successful at protecting them from frost, they will be chilled and will be slow to recover. It’s best to wait and plant peppers not until May and even then, if we have a cool wet May, wait until our night temperatures are consistently above 60 degrees.

One of the earliest small flowering trees in our landscape are the deciduous Magnolias. Here we have Star Magnolia, Magnolia stellata. This small multi-trunked tree, at maturity can reach up to 20 feet tall. It will grow in full sun to partial-shade. It is a show stopper when in bloom and will fit in a small spot in the yard. This one is almost in full bloom outside my office in Little Rock.

Sedums have become popular in recent years. I really like the creeping type, sometimes referred to as stonecrop sedums. Some of them, like this golden sedum, take on a vibrant winter color. This one can brighten up an otherwise drab perennial border while all the other perennials are still dormant. I found this one growing in the display beds at Good Earth Garden Center in Little Rock.

Flowerbeds and containers which have winter bedding plants could use a shot of fertilizer. These panolas and peacock kale have bounced back from the recent cold weather we had in central Arkansas. The kale will soon start to bloom with yellow flowers. Many gardeners cut them back once they start to bloom, but I encourage gardeners to leave them. These flowers are rich in nectar and pollen which bees are in great need of at this time.

Tete-a-tete daffodils, Narcissus ‘Tete-a-Tete’., grow only 6 – 8 inches tall. In most years, it is the first daffodil to bloom in my Fayetteville garden.This daffodil looks great along landscape borders, rock garden or in perennial beds like the one seen here. It multiplies freely so should be divided every 5 to 10 years to prevent overcrowding of the bulbs. Like all bulbous plants, the bulbs should be planted in well drained soil. Allow the foliage to remain at least eight weeks after flowers fade to provide nourishment for next year’s blooms. Just to the left of this clump of daffodils, is Ginger, Asarum arifolium. Plants of the genus asarum have a scent somewhat like that of the culinary ginger but they are not used as seasoning. This low creeping plant, makes a very attractive woodland ground cover. Most asarum species are evergreen and deer resistant. They do bloom, but the small dark flowers are low to the ground and most often not seen. There are a few asarum species that do produce large flowers, yet they are most often found under the foliage hugging the soil.

Arkansas Flower & Garden Show

February 27, 2020
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The Arkansas State Fairgrounds is the place for novice and experienced gardeners to be this weekend, February 28 through March 1, 2020. The Arkansas Flower & Garden Show brings to one place, experts in the fields of plant cultivation, propagation, and plant disease prevention and treatment.  This year’s show includes leading nurserymen, designers, naturalists and artisans.  There are over 140 vendor booths at the show selling everything from plants, tools, furniture, and bird houses to organic cosmetics, housewares, and jewelry. For details, visit the shows website at https://argardenshow.org/

Barton Coliseum has been going through a garden transformation the last three days and will be ready for public viewing Friday February 28. Show hours are 9:00 am – 5:00 pm Friday and Saturday and on Sunday 10:00 am – 3:00 pm.

Sherrie Smith, plant diagnostician for the University of Arkansas Division of Agriculture Cooperative Extension Service, will be on hand to discuss plant issues. Bring plant samples to her at her booth. She will provide recommendations to you before you leave.

Master Gardeners with the Statewide Advisory group, County 76, have garden tools and gadgets for sale at this years show.

Julie and I setup the “Join Master Gardeners” booth today and ready to promote others to join this great volunteer organization. Come by our booth and say hello.

If you are coming to the show to volunteer, you will need to check in at this booth which located at the East entrance.

This show is an excellent place to buy the unusual garden plants. This is one of the newer Hellebores (Lenten Rose) which you will find on display in my booth. Come to my booth and you will learn where you can go to purchase this particular variety. Hope to see you at this year’s show!

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