Titan Tree Blog

Some tree issues have unusual names that don’t seem to have anything to do with their name. But that’s not the case with witches’ broom – oftentimes, this deformity on trees actually looks like a broom. Witches’ broom can pop up on trees (and some shrubs and plants) for a variety of reasons. In this article, we cover how to spot witches broom, what trees in our area are likely to have it, what causes it, how it affects your trees, and what you can do.   What is Witches’ Broom? Witches broom is an abnormality that can appear on many kinds of trees or woody plants. It occurs when many small branches start growing in the same direction, creating a dense, sometimes circular, mass of branches and leaves or needles. What to Look For If you notice branches that are close together and seem to be growing in the...

Every autumn, leaves throughout much of the country change from green into brilliant hues of red, orange, yellow or burgundy. In the Phoenix area, our low desert climate means that the vibrant fall colors found in cooler climates aren’t as common. But that doesn’t mean we don’t have any bright autumn leaves to admire! When do leaves change color in the Phoenix area? While Northern Arizona, with its higher elevation, sees leaves change during the actual fall season, here in Phoenix the colors change a bit later in the year. It’s not uncommon to see falling leaves next to outdoor Christmas decorations or to see dots of colorful foliage after the new year arrives. While not all trees in our area have leaves that change color, the bright pop of yellow or orange next to our native plants is usually a noticeable change. Look for leaves to change color in...

If you’ve ever noticed a cluster of what appear to be twigs or small branches concentrated together in your mesquite or palo verde tree, it may in fact be desert mistletoe. Mistletoe is often confused for a nest or hive, but it is a living, growing organism. What is desert mistletoe? Desert or mesquite mistletoe ( Phoradendron californicum ) is a hemiparasite that affects many of our local trees. It doesn't look quite like the traditional mistletoe hung in doorways during the holidays, but that's because it's a different variety. There are over 1,000 distinct species of mistletoe worldwide. The scientific classification of mistletoe, Phoradendron , translates to “thief of a tree,” which is a good way to think about mistletoe. It’s not “death of a tree,” per se, but it does rob your tree of certain things. As a hemiparasite, desert mistletoe attaches itself to a tree and steals...

If you’re constantly weeding your Phoenix or Anthem area yard, you may want to consider using a pre-emergent treatment to control the problem. These types of herbicides are applied to stop weed seeds from growing and act very differently from the weed killer sprays used after weeds have emerged. We answer the most frequently asked questions about pre-emergent herbicide use below, including what it is, when it should be applied, if it harms your other plants, and more.   What is pre-emergent weed control? The answer is in the name – pre-emergent is applied BEFORE weeds appear. This type of liquid herbicide works to prevent weed seeds from growing . How does pre-emergent herbicide work?   Contrary to popular belief, pre-emergents don’t prevent seeds from germinating . Instead, they prevent a germinated seed from growing any further. Once a seed has germinated, its root absorbs water from the surrounding soil....

As the long summer months in the Phoenix area drag on, you may notice some of your tree or plant leaves turning brown or dying. Property owners often assume that these brown leaves signal a pest or disease issue. In fact, the most common culprits are much more simple: lack of water, too much salt, or incorrect fertilizer use. Dried or brown leaves may appear to be just a cosmetic issue, but they often signal a bigger problem that should be resolved as quickly as possible. Doing nothing will make your tree more susceptible to opportunistic pests or diseases such as palo verde borers . In this article, we go over each cause and what you can to do prevent or solve them, making your leaves green and vibrant and your tree or plant healthy once more! Drought Stress If your leaves look scorched, your leaves may not be receiving...

When you think of the sounds of summer, one of the most common sounds in the Phoenix and Anthem areas is noise from cicadas. In this article, we go over some common questions about these noisy neighbors, including how they are able to be so loud, if they can damage your trees, and why you generally hear them during the hottest parts of the day.   Are my trees making noise? Summertime in southern Arizona comes with many unique phenomena – monsoons, dust storms, microbursts, flash flooding – and trees that appear to be buzzing or singing. The noisy trees are actually insects called cicadas, cleverly hidden amongst the tree’s branches. Between the projection of their sound, their clever hiding techniques, and their stealthy moves to avoid detection, cicadas are not easily spotted on trees, but they are widely heard. I’ve read about 17-year cicadas, is that what these are?...

Also known as the palo verde beetle, palo verde root borer, or palo verde borer beetle, Derobrachus hovorei is a longhorn beetle that can sometimes be confused as a cockroach. But, unlike cockroaches, this insect attacks and kills palo verde trees (among others). This pest exists as both a grub (or borer) during its immature phase, and a large beetle during it’s adult stage. What does the adult beetle look like? You’ll recognize the palo verde beetle by its size. As one of the largest beetles in North America, it can be up to three and a half inches long, and that doesn’t include the antennae! The adult beetles are brown or black and have wings, but are rarely seen flying other than during the summer mating season. Adult borers have a tough outer shell, which makes them difficult to kill. You’ll notice these large beetles most often during monsoon...

The Texas mountain laurel is a beautiful, evergreen shrub or small tree, with fragrant purple flowers and one noticeable problem – each summer, the plant may suddenly start losing its new leaves and buds. It looks like something is eating the plant, but it’s not always obvious what’s causing it. In this article, we explain what’s happening, what it does to your Texas Mountain Laurel, whether you should be worried about it, and more. Something seems to be eating my Texas mountain laurel. What is it? It’s most likely genista caterpillars ( Uresiphita reversalis ), which hatch into the broom moth They are known to eat the leaves of both broom plants (genista means “broom”) and Texas mountain laurels. Could it be something else? Texas mountain laurel leaves are toxic to most other kinds of pests, but they don’t affect genista caterpillars. In fact, any predators, such as birds, that...

Spring arrives much sooner in Phoenix than it does in other parts of the United States, with wildflowers popping up as early as February and various flowering shrubs showing off bright colors in March and April. While it’s possible to have something in your Phoenix-area yard bloom almost any time of the year, there’s something special about flowers in spring. Between the colors and the scents, you know that a new season has begun. If you’d like to add some spring-blooming plants or shrubs to your yard, here are some of our top recommendations. All can be found on the Anthem list of approved plants .   Fairy Duster Bring a little magic to your yard with a fairy duster shrub. Evergreen for most of the year, the feathery pink or red flowers appear in late winter through spring. Sometimes they bloom again in fall. The delicate flowers resemble the...

We usually think of trees as being strong and stable, anchored by a network of roots underground. So why would your tree, especially one that has weathered storms for years, suddenly fall over or be uprooted? An important note: Urban trees aren’t like trees in nature One thing to understood is that trees in urban or suburban settings have different needs than those that grow naturally in the desert. The soil surrounding houses is usually compacted, has fewer nutrients, leaves less room for tree roots, and is more likely to have some form of irrigation on or near it. These are very different circumstances than a tree in the wild, where decaying plant matter and animal activity leads to nutrient-rich soil, the ground is rarely compacted (especially if its nowhere near where humans regularly tread), has a variety of plant life around it to promote a mycorrhizal network , and...

One of the biggest concerns we hear when we mention planting more trees in our area is the amount of water needed. Water is scarce, so why “waste” it on trees? In our opinion (which is backed up by scientists, forestry workers, arborists, and other members of the green industry), planting a native or desert-adapted tree is well-worth the water it needs to become established. How much water does a desert tree need, really? Most native and adapted trees (trees that have adapted to life in the desert) need far less than you may think! In fact, most survive on rainfall alone after the first 2-3 years (although they’ll happily accept an occasional deep watering during the drier summer months). During the first few years after planting, trees benefit from a long, deep watering at the dripline (where the edge of the tree canopy is). This will help the tree’s...

Part of living in the Anthem and Phoenix areas is enjoying the unique variety of native plants. Of course, the most easily recognizable desert plants are different kinds of cactus, including the iconic saguaro (Carnegiea gigantea). The saguaro’s tall stature and curved arms make it stand out, and the flowers it produces in the late spring and summer months are our state flower for a reason! If you’re lucky enough to have them on your property, you know that they need different care than your trees or flowers. Here are some things you may not know about the saguaro cactus: Not all of them grow arms. If well cared-for, they can live 150-200 years or more. Saguaros have quite the system for getting water – they have one deep taproot that can extend into the ground about 3-5 feet deep, but the rest of the roots are only 4-6 inches...

“The right tool for the job” is more than just an old saying. It’s especially accurate when you’re going to prune your trees. The wrong tool, along with its wrong application, can seriously injure a tree—and possibly you, too. While we recommend all major tree work be done by a certified arborist, some homeowners prefer to do smaller pruning jobs themselves. To help you get the best results, this article describes the right pruning tools to use for specific pruning tasks, the features to look for when choosing your tools, and safety considerations to be aware of. PRUNING TOOL BASICS The first thing to consider when buying or using tools for tree work of any kind is their quality. A good tool may be inexpensive, but more often you will find that cheap pruning tools are weaker, lighter-weight versions of standard tools. Cheap pruning and tree care tools often use:...

Many people, including plenty of landscapers, plant trees too deep and this almost always results in damage to the tree (in fact, it’s often a fatal mistake). This is easy to remedy if you know what to look for and how to plant correctly. No matter their container size or type, all trees need to be planted at the right depth for their root system. Read on and you can avoid one of the most common tree-planting mistakes. How deep is too deep when planting a tree? The measure for tree planting depth is the tree’s root flare. Sometimes called trunk flare or root collar, this is the area just above where the topmost roots emerge from the trunk. Confusingly, there is not always a flare here, meaning that some trunks, especially on young trees, may look like a straight cylinder. Don’t worry. If you don’t see a flare, look...

We’ve gone over the myriad of benefits that trees provide in earlier blog posts: they remove pollutants, decrease stress, improve health, prevent storm runoff, provide food and shelter for wildlife…the list is endless. Yet I’m sure most of us in the greater Phoenix and Anthem areas would agree that there’s one reason in particular that we love trees: shade. Unlike man-made shade structures, trees actually lower the temperature of the air around them through a process called transpiration. So, when possible, planting a tree instead of building a structure reduces the overall temperature. In a city like Phoenix where the temperatures seem to keep rising every year, that’s important. Most yards in our area are small, however, so the options are limited when choosing a native tree that provides shade but doesn’t grow too tall, have invasive roots, or take up too much of your yard. Here are our suggestions...

If you’ve never used landscape lighting, you may be surprised at what a difference it can make. When daytime temperatures in the northern Phoenix area drive us indoors during the summer, the cooler nighttime hours become the best time to enjoy your yard and garden. And the right types of landscape lighting make all the difference. Where to Add Lighting to Your Yard A softly lighted pathway can lead the way to a pergola, a string of lights under your awning can make dining al fresco seem like a vacation, or highlighting a tree or favorite shrub with a soft glow can give an entirely different look at night. If you have steps or a dark walkway, lighting can also serve as a safety feature. And it’s not just hardwired lighting that enhances your outdoor spaces. Solar lights are a great option to line sidewalks, and there are also solar-powered...

Salty soil? In the desert? Really? Yes, really. We have pretty hard water in Anthem and the greater Phoenix area, meaning that there are a lot of minerals dissolved in it. When the water dries (including in your soil), minerals such as calcium and magnesium carbonate come out of solution and turn into hard crystals – that’s the whitish buildup you see around faucets. Those minerals are referred to as "salts." While salt is great around the rim of a margarita glass, when it gathers in soil you’ll start to see adverse effects (including death) in your plants and any trees that receive water from irrigation. What Causes Salt to Build up in Desert Soil? The biggest culprit in salt buildup is shallow, frequent watering. Picture this: If you have an irrigation system (like most Anthem and Phoenix-area residents), it’s probably on a timer to water twice a day for...

Your trees are probably infected with a fungus. How’s that for an attention-getter? But here’s the shocking part – it’s a good thing. In fact, you want to encourage this particular type of fungus to infect your trees, plants, and shrubs whenever possible. Let’s back up a minute to explain the strange relationship that this type of fungus (called mycorrhizae) has with plants. An Unlikely Pair In a true example of symbiosis, plants and mycorrhizae (pronounced mi-cor-ri-zay) work together, sharing nutrients and benefits with each other. The mycorrhizae (from the Greek mykes: fungus and rhiza: root) attach themselves to a plant’s roots. They then spread out from the roots in microscopic strings, gathering moisture and nutrients that the plant itself can’t reach and/or can’t break down to use. The mycorrhizae bring these nutrients to the plant and, in return, the plant gives the fungus carbon and carbohydrates (or sugars) that...

I was sitting outside a coffee shop the other day, watching appreciatively as a palo verde tree’s bloom-laden branches swayed gracefully in the breeze. The contrast of the bright yellow against the shockingly deep blue sky was mesmerizing. As I was admiring the tree, a couple walked out of the coffee shop. Catching sight of the tree, one of them grumbled, "Ugh, pollen!"" and walked away from the tree as quickly as possible. As an allergy sufferer myself, I understood. Allergies are miserable. If I don’t take an antihistamine daily, I can barely suffer through the day. Pollen is the source of most spring allergies, though some mold, dust, and pollutants cause allergies as well. But the bright, yellow flowers on the spring palo verde tree are not the only thing causing spring allergies here in the Phoenix area – and they are far from the worst culprit. Pollen and...

In 2010, Arizona State University and the City of Phoenix adopted a plan to create an urban forest in the city. The goal of the Tree and Shade Master Plan is to have a 25% tree canopy in Phoenix by 2030. As the city currently has an average tree coverage of only 9-11%, this is a plan that will need considerable support and help from Phoenix area residents and visitors to make possible. We highly recommend reading through the entire plan yourself, but below are the highlights of the Vision. By 2030: Phoenix has a healthy, diverse and sustainable urban forest that reflects and preserves the beauty of the Sonoran Desert. Shade trees line streets and residential neighborhoods are cooled by tree groves. The urban forest lowers the temperature during summer months, reducing energy use and making the city more comfortable for residents and visitors. Citizens understand the benefits of...