Thursday, December 20, 2012

Christmas Cactus FAQs

Rosie Lerner, Purdue Extension Consumer Horticulture Specialist

Christmas cacti are not only popular holiday gift plants, but they are also the subject of frequent debate among gardeners. There appears to be much confusion about these unique tropical cacti regarding care, maintenance and, especially, on how to get them to re-bloom. The following tips address the most frequently asked questions.

We typically think of cacti as being heat tolerant, but Christmas cacti will keep their blossoms longer in cooler temperatures. Keep the plant in a well-lit location away from drafts from heat vents, fireplaces or other sources of hot air. Drafts and temperature extremes can cause the flower buds to drop from the plant before they have a chance to open.

Christmas cactus is a tropical type plant, not quite as drought tolerant as its desert relatives and, in fact, may drop flower buds if the soil gets too dry. The plants will wilt when under drought stress. Water thoroughly when the top inch or so of soil feels dry to the touch. The length of time between waterings will vary with the air temperature, amount of light, rate of growth and relative humidity.

The plant does not particularly need to be fertilized while in bloom, but most gardeners enjoy the challenge of keeping the plant after the holidays for re-bloom the next year. While plants are actively growing, use a blooming houseplant-type fertilizer and follow the label directions for how much and how often to feed.

While the Christmas cactus can adapt to low light, more abundant blooms are produced on plants that have been exposed to more light intensity. Keep your plants in a sunny location indoors. Plants can be moved outdoors in summer, but keep them in a shady or semi-shady location. Leaves may start to turn a bit red if exposed to excessive light. Too much direct sunlight can actually burn the leaves or may cause them to become limp. When it's time to bring the plants back inside in the fall, slowly adjust the plants to life indoors by gradually increasing the number of hours they spend indoors each day.

If your plant tends to dry out and/or wilt frequently, it may be time to repot the plant into a slightly larger container. Well-drained soil is a must for Christmas cactus. Use a commercially packaged potting mix for succulent plants or mix your own by combining two parts plain potting soil with one part clean sand or vermiculite.

Pruning your Christmas cactus after blooming will encourage the plant to branch out. Remove a few sections of each stem by pinching them off with your fingers or cutting with a sharp knife. These sections can be rooted in moist vermiculite to propagate new plants.

Christmas cactus will bloom if given long uninterrupted dark periods, about 12 hours each night. Begin the dark treatments in about mid-October to have plants in full bloom by the holidays. You can place the plants in a dark closet from about 8 P.M. - 8 A.M. each night for 6-8 weeks or until you see buds forming. Christmas cacti will also bloom if they are subjected to cool temperatures of about 50 to 55 degrees F, eliminating the need for the dark treatments. Plants should be blooming for the holidays if cool treatments are started by early November.

Other species of holiday cactus bloom at different times of the year and have slightly different growth habits. Christmas cacti have scalloped stem segments and bloom at the stem tips. Thanksgiving cacti have 2-4 pointy teeth along the edges of the sections and will bloom earlier than Christmas cactus if left to natural day-length. Easter cacti have rounded teeth along the segments and bloom primarily in the spring but may also periodically re-bloom at other times of year.

Weekly Outlook - Difficult to Anticipate Dec. 1 Corn Stocks Estimate

The USDA’s estimate of December 1, 2012 inventories of corn, to be released on January 11, 2013, will be one of the more important factors influencing the price of old crop corn in the first quarter of the new year. The estimate of soybean stocks may be somewhat less important because more is known about the level of consumption during the first quarter of the 2012-13 marketing year.

For soybeans, consumption during the first quarter of the marketing year is generally known because periodic export and crush estimates are available. Based on Census Bureau estimates for September and October and USDA inspection estimates through November, exports were near 613 million bushels. That would be slightly less than the record large exports of two years ago. Based on estimates from the National Oilseed Processors Association, the domestic crush during the first quarter was near 448 million bushels, the largest in five years.  <Read More>

Choosing Corn Hybrids for 2013

Hybrid selection is one of the most important management decisions a corn grower makes each year. It’s a decision that warrants a careful comparison of performance data. It should not be made in haste or based on limited data. Planting a marginal hybrid, or one not suitable for a particular production environment, imposes a ceiling on the yield potential of a field before it has been planted. In the Ohio Corn Performance Test (OCPT) (http://www.oardc.ohio-state.edu/corntrials/) it is not unusual for hybrid entries of similar maturity to differ in yield by 80 bu/A, or more, depending on test site.

Growers should choose hybrids best suited to their farm operation. Corn acreage, previous crop, soil type, tillage practices, desired harvest moisture, and pest problems determine the relative importance of such traits as drydown, insect and disease resistance, herbicide resistance, early plant vigor, etc. End uses of corn should also be considered - is corn to be used for grain or silage? Is it to be sold directly to the elevator as shelled grain or used on the farm? Are there premiums available at nearby elevators, or from end users, for identity-preserved (IP) specialty corns such as food grade or non-GMO corn? Capacity to harvest, dry and store grain also needs consideration. The following are some tips to consider in choosing hybrids that are best suited to various production systems.  <Read More>