by Molly Jameson | Apr 7, 2017
Be careful planting cucurbit transplants, as they have sensitive roots. Photo by Molly Jameson.
When I think of the end of winter and the hot temperatures that will soon be here to stay in the Florida Panhandle, I often feel a little melancholy. But the one silver lining that always picks me back up is remembering what warmer temperatures will mean in the garden. This is the start to all the fun, colorful, fruiting crops. Think of the oranges, reds, yellows, and even purples that will soon fill their vines.
As an extension agent, one of the questions I am often asked is whether to start summer vegetables from seed directly in the garden, or to start seeds in pots and transplant them later. The answer is – as is often the case – it depends.
Are you planting tomatoes, peppers, or eggplant? Well, the beginning of April is too late to start from seeds with these crops in our neck of the woods. Buy transplants! Are you growing beans, okra, or root crops? Now that we are past the risk of frost, put those seeds directly into your garden. Are you growing cucurbits, like squash, cucumbers, or melons? You have a choice. You could seed them directly, or you could start seeds in pots. What is the advantage of starting in pots, you ask? Well – this will give you the chance to pick the strongest plants and will allow you to transplant them exactly where you want them. The disadvantage? Other than the extra work, cucurbits tend to be sensitive to disturbance. Be sure to handle with care and do not over water once your seedlings have sprouted.
Transplant into the garden when the plant is about the length of its pot. Photo by Molly Jameson.
Whether you grew the seeds in pots yourself or acquired transplants elsewhere, there are certain practices you can follow to ensure your plant babies have a good start. Here are a few tips when it comes to transplanting into the garden:
What should be considered when purchasing transplants? When purchasing transplants, it is important to make sure the plant is healthy. Look for plants with strong stems, green leaves, and no signs of pest or disease damage. Ideally, the plant should not be much taller than the length of its pot, and should be about as tall as it is wide. Also, avoid vegetable plants that are already producing fruit, this is an indication they have been in their pot too long, prompting them to become stressed. When stressed, annuals often feel they need to hurry and produce seeds to carry on the next generation.
When should transplants be planted into the garden? For spring gardens, plant transplants once danger of frost has passed (late March in the Panhandle), when the transplant has had time to develop a strong root system, and when the transplant is about the length of its pot. If you are growing your seeds indoors or in a greenhouse, allow the plant to “harden-off” by placing the plants outdoors in partial shade for a few hours a day for about a week before transplanting.
What is the transplanting process?
- First, prepare your garden site with compost and other soil amendments.
- Water your plants very thoroughly just before planting to decrease transplant shock. The entire root system should be completely wet.
- Dig a hole that is at least double the width of the plant’s root ball.
Add fresh compost or worm castings to each planting hole to give your plants an extra nutrient boost. Photo by Molly Jameson.
- Add one to two handfuls of fresh compost or worm castings to each hole. These soil amendments will improve soil health, introduce beneficial microbes, and provide a slow- release nutrient source for your growing seedlings.
- Avoid covering any leaves or stems under the soil surface. Remove these lower leaves and stems with sharp garden clippers to minimize the size of the wound.
- Avoid touching the stem and avoid disturbing the root ball when removing the transplant from its pot. Gently squeeze the pot to loosen the potting soil and turn the transplant sideways or upside down with the palm of your hand to gently “catch” the transplant.
- Unless the transplant is a tomato, plant it so that the soil level is about the soil level of the transplant, making sure the plant has good structure to decrease susceptibility of falling over as it grows.
- If transplanting a tomato, plant deeper than the soil level of the transplant, as tomatoes can grow what are called “adventitious” roots – roots that grow from their stem – that will improve overall root development.
- Make sure to cover up all roots, and water the soil around the plant thoroughly. Continue to water deeply, keeping the soil moist but not soggy, for the next three to four days while the plant becomes established. You can then begin to switch to a normal watering pattern.
- Always water the soil around the plant, not the plant leaves, throughout the season to decrease susceptibility to disease.
Remember: gardening is a science and an art! And just like art, there are many aspects that are open to interpretation. Have fun gardening – experiment and try new techniques. Keep a journal tracking all your gardening adventures. With time, this can become your road map to the sweetest of summer fruit.
by Sheila Dunning | Mar 20, 2017
Now is the time to prevent your azaleas from being attacked by lace bugs. The azalea lace bug, Stephanitis pyrioides, overwinters as eggs on the underside of infested leaves. Eggs hatch in late March and early April. The insect then passes through five nymphal instars before becoming an adult. It takes approximately one month for the insect to complete development from egg to adult and there are at least four generations per year. Valuable plants that are susceptible to lace bug damage should be inspected in the early spring for the presence of overwintering lace bug adults, eggs and newly hatched nymphs. Inspect these plants every two weeks during the growing season for developing lace bug infestations.
Both adults and nymphs have piercing-sucking mouthparts and remove sap as they feed from the underside of the leaf. Lace bug damage to the foliage detracts greatly from the plants’ beauty, reduces the plants’ ability to produce food, decreases plant vigor and causes the plant to be more susceptible to damage by other insects, diseases or unfavorable weather conditions. The azalea can become almost silver or bleached in appearance from the feeding lace bug damage.
However, lace bugs often go undetected until the infested plants show severe damage sometime into the summer. By then several generations of lace bugs have been weakening the plant. Inspecting early in the spring and simply washing them off the underside of the leaves can help to avoid damage later and the need for pesticides.
Adult lace bugs are flattened and rectangular in shape measuring 1/8 to 1/4 inch long. The area behind the head and the wing covers form a broadened, lace-like body covering. The wings are light amber to transparent in color. Lace bugs leave behind spiny black spots of frass (excrement).
Lace bug nymphs are flat and oval in shape with spines projecting from their bodies in all directions. A lace bug nymph goes through five growth stages (instars) before becoming an adult. At each stage the nymph sheds its skin (molts) and these old skins often remain attached to the lower surface of infested leaves.
Azalea lace bug eggs are football-shaped and are transparent to cream-colored. Lace bug eggs are found on the lower leaf surface, usually alongside or inserted into a leaf vein. Adult females secrete a varnish-like substance over the eggs that hardens into a scab-like protective covering.
For more information go to: http://entomology.ifas.ufl.edu/creatures/orn/shrubs/azalea_lace_bug.htm
by Beth Bolles | Dec 22, 2016
A new tree or shrub is an investment for the future. When we pick an ornamental plant, we have the hope that it will survive for many years and offer seasons of beauty that enhance our landscape. Time is often spent picking a suitable spot, preparing the planting hole, and watering until establishment. We give it the best of care to make certain that our new plant becomes a more or less permanent feature.
With all of our tender love and care for new ornamentals, there is one important practice that we may neglect. Most homeowners purchase plants in containers and it is common to find root balls with circling roots. If any root ball problems are not addressed before installation, the life of your plant may be shorter than you want.
Ten years after installation, this plant was ultimately killed by girdling, circling roots. Photo by Warren Tate, Escambia County Master Gardener.
The best practice for woody ornamentals is to cut any roots that are circling the trunk or container. Homeowners may slice downward through the root ball around the entire plant. For shrubs, it is recommended to shave off “the entire outside periphery of the rootball” to eliminate circling roots. These practices allow the root system to grow outward into new soil and greatly reduce the possibility of girdling roots killing your plants years after establishment.
Circling roots are cut before installation. Photo by Beth Bolles, Escambia County Extension.
For more information on shrub establishment, visit the UF Publication Planting Shrubs in the Florida Landscape.
by Beth Bolles | Nov 22, 2016
Leaf wilt may indicate more than just dry soil. Photo by Beth Bolles
Plants have specific ways of telling gardeners that there is a problem, but not all plant symptoms lead us directly to the cause. During drier conditions, we often use wilting leaves as an indicator that water is needed. This can be a reliable symptom that the soil is lacking moisture but it is not always the case. Wilting leaves and herbaceous branches actually tell us that there is not adequate water in the plant. It does not necessarily indicate lack of moisture in the soil.
There can be many reasons why water is not being absorbed by roots and moved to tissues in the plant. The obvious place to start is by checking soil moisture. If soil is powdery several inches deep around the plant, water is likely needed. However, if you ball the soil up in your hand and it holds together, there may be another reason for lack of water reaching the upper plant parts. The harder part is determining why the root system is not taking up water. Causes can be a rotted root system from too much water, a poorly developed root ball that has circling or kinked roots, and even problems in the soil such as compaction. Insects, diseases, and other pathogens can also injure root systems preventing the uptake of water.
Too much water can cause roots to decay, preventing the uptake of water. Photo by Beth Bolles
So before automatically grabbing the hose or turning on the sprinkler, do a little soil investigation to make sure that the plant wilt is really indicating lack of water in the soil. If you need help in your diagnosis, always contact your local Extension office.
by Beth Bolles | Aug 12, 2016
Homeowners and horticulture professionals spend time to develop an attractive ornamental bed only to have weeds take over months or a few years later. One common method in the attempt to prevent weeds is to apply a landscape fabric around plants in beds and place a layer of mulch on top to dress it up. The thought is that this barrier on top of the soil will prevent a large number of weeds from emerging. The fabric physically prevents the growth of weeds form the soil below and blocks sunlight from reaching weed seeds. Available fabrics are labeled as porous to allow air and water to move through them and reach ornamental plant roots.
On paper, landscape fabric sounds like a good idea and it may work for a little while. Over time, soil particles and decomposing mulch fill up the porous spaces in the fabric which prevent air and water from reaching plant roots. Even with irrigation or routine rainfall, plant roots often do not receive the needed water and air for healthy growth. Plants may respond by trying to send roots through fabric seams which breaks down the intended weed barrier. Other plants slowly decline or may die quickly due to water stress or lack of sufficient air movement into the soil.
Fabric may initially prevent some weeds but it can also prevent air and water movement. Photo by Beth Bolles, UF Extension Escambia County
Weed seeds also find their way into the mulch that is on top of the fabric from nearby lawns and landscapes. The next thing you know, you have an entire weed crop growing in the mulch on top of your landscape fabric. Perennial weeds such as torpedograss and purple nutsedge eventually grow through fabrics.
Seeds from annuals like Chamberbitter easily get into mulch from surrounding areas and grow on top of fabrics. Photo by Beth Bolles, UF Extension Escambia County
The best place to consider fabric if you want to install it in the landscape is under mulched paths or other areas without ornamental plantings where a synthetic groundcover is needed. In order to have a healthy root environment for your ornamental bed plants, it is best to keep landscape fabric out of these areas.
by Molly Jameson | Aug 12, 2016
Ants can be treated with spinosad in vegetable gardens. Photo by Molly Jameson.
There’s nothing worse than sinking your fingers into your garden soil to dig up a potato, plant a seedling, or pull up a radish, and be met with a sharp, painful sting, and little red critters rocketing up your arms. If you are a gardener in the panhandle, my bet is that you know exactly to what I refer: fire ants!
Fire ants are certainly not native to our area. These guys are an invasive species from South America that are very resilient, and many are territorial, with the potential to drive out any native ant populations. Fire ants arrived in the 1930s, and can now be found throughout most of the southeastern United States.
So when you end up with fire ant mounds engulfing your carrot patch, what can be done? Since fire ants in your garden mean fire ants in your food, the least toxic control methods are of high importance and conventional broadcast bait treatments and mound treatments should be avoided. Even in your lawn, be careful when using strong insecticidal bait treatments, as these can harm the native ant populations that help control the spread of fire ants. This can then lead to a strong resurgence of fire ant populations that can outcompete the native ants.
Although completely controlling fire ants in an area is not possible, there are sustainable management techniques that can help. Some fire ant colonies have a single queen while others have multiple queens. Either way, in order to eliminate a fire ant colony, all queens in the colony must be killed. Fire ants are omnivorous, in that they eat plants, insects, sugars, and oils. The catch is that they are only able to ingest liquids, so solid food must be brought into the colony, where larvae regurgitate digestive enzymes onto the food, breaking it down into liquids. Therefore, any method of control by ingestion will need to be in liquid form, or the ants must be able to bring the material into the colony, without first being exterminated.
Fire ants can become a problem around and in raised vegetable gardens. Photo by Molly Jameson.
There are some commercially available products that contain boric acid or diatomaceous earth. These products may reduce populations, but eliminating whole colonies with these products can be a challenge.
The use of a nervous system toxin called spinosad is effective on fire ant populations and is considered safe to use in vegetable gardens. This toxin comes from a bacterial fermentation process, and is therefore considered organic. But be aware, even though there are organic products with ingredients derived from botanical sources such as rotenone and nicotine sulfate, they should not be used in vegetable gardens. When using chemical methods of control, always follow the directions on the label carefully.
One physical method of control is the use of hot water. Three gallons of scalding water, which is between 190 to 212ºF, has been used on colonies with a success rate of 20 to 60 percent, when applied in several treatments. You will want to slowly pour the water on the colony, being extra careful not to get burned, and avoid injuring any surrounding plants. If you are like I am, and you often leave your garden hose in the hot sun, you can spray the ant colonies with the hot water, as you wait for the water to cool off enough to water the garden. Hot water control takes persistence, but you can eventually drive the ants out.
Another method of physical control is excavation. This requires digging up the mound, putting it in a bucket, and taking it to another location. Apply talcum or baby powder to your shovel handle and bucket to help prevent the ants from escaping and crawling up to sting you.
One reason fire ants are so rampant in the United States is that they have little competition or natural enemies. Scientists have released multiple species of phorid flies, natural parasites of fire ants in South America, and a few species have become established. Scientists at UF/IFAS are currently researching additional fire ant biological control methods, such as the use of a fungi, which has shown promise.
Remember, not all ants in the garden are bad guys! Many species act as roto-tillers, aerating and redistributing nutrients in the soil. They also play a role as decomposers as they assist in turning dead insects into soil nutrients. Ants can disturb garden pests by attacking them or interrupting their feeding, mating, and egg laying processes. Additionally, ants are a food source for wildlife, such as other insects, frogs, lizards, birds, spiders, and even some mammals.
