Plant of the Week:  Mistflower (Conoclinium coelestinum)

Plant of the Week:  Mistflower (Conoclinium coelestinum)

October is the premier wildflower month in the Panhandle.  Nighttime temperatures drop, days shorten, pollinators emerge, and many native plants explode into flower.  Of all the native fall-flowering Panhandle wildflowers, maybe the most striking is currently in full bloom, the Mistflower (Conoclinium coelestinum)! 

Photo credit Bill Boothe / Natural Encounters

Mistflower is a low growing, spreading native perennial (1-2’ in height) found in sunny, moist areas of meadows and near rivers, ponds, and creeks throughout much of the United States from New York to Florida and even west as far as Texas and Nebraska.  This common native wildflower is conspicuously one of the few native plants in our area that has blue flowers, making Mistflower easy to spot in a sea of yellow, orange, purple, pink, and white wildflowers.  The flowers appear as little puffs of purply-blue due to the lack of ray florets (think the outer yellow “petals” of sunflowers), possessing only disk florets (think the inner part of sunflower heads) with long blue, fuzzy-appearing stamens.   Mistflower is attractive to more than just wildflower watchers as well, it’s a magnet for nectar-seeking butterflies as well; Eastern Swallowtails, Great Purple and Juniper Hairstreaks, and others are often found feeding on the flowers. 

Great Purple Hairstreak butterfly on Mistflower. Photo credit Bill Boothe / Natural Encounters.

As lovely as Mistflower is in the wild, it’s probably best left for folks enjoy there, especially those who prefer an orderly yard.  Mistflower will indeed grow great in moist areas of pollinator gardens and landscapes, requiring only ample sunlight and rainfall, but it is very aggressive.  Its spreading nature via its rhizomatous root system and prolific seed production often lead to it becoming a weedy nuisance in more manicured landscapes.  But, if chaos and fall bursts of blue erupting at random throughout your garden don’t bother you, by all means, seek out Mistflower for purchase through seed catalogs and local native nurseries.  For more information on Mistflower and other fall-blooming native wildflowers, contact us at the UF/IFAS Calhoun County Extension office!  Happy Gardening.

Fall into Action – Winter Weeds & Turfgrass

Fall into Action – Winter Weeds & Turfgrass

Weeds are basically unwanted plants or plants growing out of place. Proper identification and some understanding of how and why weeds are present in a lawn are important when selecting the best management tactics. All turf weeds can be grouped into one of three life cycles: annual, biennial, or perennial.

Annual: Produces seeds during one season only

Biennial: Produces seeds during two back-to-back seasons

Perennial: Produces seeds over many seasons

Knowing the types of weed previously present in an area also can help one to be better prepared and what control measures to employ in the future.

Weeds may appear in multiple categories, either broadleaf, grass, or Sedges/rushes.

Lawn with winter annual weeds in early spring
Winter annual weeds in lawn in early spring. Photo credit: Larry Williams

Broadleaves, or dicotyledonous plants, have two cotyledons (seed leaves) when the weed seed germinates.

Appearance: Broad, flat leaves with net-like veins and usually have showy flowers.

Common types: Clover, ground ivy, dandelions, chickweed, plantain, henbit, beggarweed.

Grasses are monocotyledonous plants that have only one cotyledon, or seed leaf, present when seedlings emerge from the soil.

Appearance: Narrow leaves with parallel veins in their true leaves. Hollow rounded stems.

Common types: crabgrass, goosegrass, crowfoot grass, bull grass, annual bluegrass, alexander grass, cogon grass, torpedo grass, and smut grass.

Sedges/rushes. Both favor a moist habitat. Appearance: triangular-shaped, solid stems, while rush stems are round and solid.

Common types: yellow and purple nutsedge and, to some degree, globe, Texas, annual, and water sedge.

One of the first steps in managing weeds is to have a healthy dense lawn/ turf to provide shade that prevents seed germination. Having a healthy lawn depends on turf species selected – making sure you put the right plant and right place. Other factors that influence a heathy turf and a reduced amount of weeds include proper cultural control, fertilizing regularly, mowing at the appropriate height, watering deeply, reducing traffic, pest control, and sanitation. If you only have a few bothersome weeds in your lawn, you may be able to dig them up by hand—but if your lawn is overrun with weeds, you may need to start from scratch. If you decide to start from the beginning, you have a choice ahead of you. Do you want to lay down seed or sod? There are pros and cons to each.

Seed

Pros: Less expensive, more variety

Cons: Takes longer to germinate, can only lay at certain times of year depending on grass type

Sod

Pros: Instant grass, can lay any time of year, requires little maintenance

Cons:  More costly, less variety in grass can mean less healthy lawn overall

To prepare the soil after either method, make sure you till it down to roughly 6 to 8 inches.

Supporting information for this article can be found in the UF/IFAS EDIS publications (Weed management for Florida lawns)  https://edis.ifas.ufl.edu/publication/EP141 or contact your local Extension Office!

Pruning Hydrangeas

Pruning Hydrangeas

We grow many types of hydrangeas in North Florida. In order to prune your hydrangeas at the correct time of year, you need to identify which types you have in your garden.

Bigleaf hydrangea (Hydrangea macrophylla)
Bigleaf hydrangea (Hydrangea macrophylla) comes in mophead and lacecap flower forms. They bloom on old wood, so prune in summer after blooming is finished. Repeat bloomers, such as ‘Endless Summer’ bloom on both old wood from the previous year and on the current season’s wood. You can prune after the first bloom and still get a bloom later in the season.

Hydrangea macrophylla. Photo by Beth Bolles,
UF IFAS Extension Escambia County

Oakleaf hydrangea (Hydrangea quercifolia)
A native hydrangea that blooms on old wood, so prune after flowering. This type requires little pruning, only
to maintain size and shape.

Oakleaf hydrangea. Photo by Beth Bolles,
UF IFAS Extension Escambia County

Panicle hydrangea (Hydrangea paniculata)
These shrubs bloom on new wood, so prune in winter or early spring before new growth emerges. ‘Limelight’ and ‘Pee Gee’, are examples of this type. Plants only require pruning to shape or thin out the shrub.

Limelight hydrangea. Photo by Beth Bolles,
UF IFAS Extension Escambia County

Here are some additional pruning tips for your hydrangeas.

For all types, check for winter-damaged wood in early spring. Remove all dead branches before buds start to open.
Some plants need rejuvenation pruning. Old wood may die back or be less productive, so in early spring remove very old stems at the base. This stimulates new growth.
Deadheading flowers (cutting off spent blooms at a set of leaves) can happen as needed.

Select and Plant Trees for Florida’s High Wind Climate

Select and Plant Trees for Florida’s High Wind Climate

Many future problems can be avoided by paying attention to tree selection, planting and maintenance in Florida’s high wind climate. We may think of tropical storms causing tree damage but our typical summer thunderstorms can produce winds in excess of 50 miles per hour with downbursts reaching over 100 mph. 

There is no way to protect trees from all storm damage. Trees are not adapted to worst-case storms, such as Hurricanes Michael or Ian, only to our average wind climate.

It’s wise to take time to select and correctly plant the right trees for North Florida.

Past hurricanes have taught us that large growing trees planted too close to curbs, sidewalks or buildings blow over easily because they don’t have adequate room to develop a sound root system. It’s best to either plant these trees farther away, plant trees that may stay small, or increase the size of space allocated for tree root growth.

Research and storms have taught us that tree roots need large soil spaces for strong, stable growth. The more rooting space trees have, the less likely they are to fail. Strong root growth is essential for tree stability and health. Large maturing trees need at least 30 feet by 30 feet (900 ft. sq.) of rooting space. Many construction practices such as paving over roots, raising and lowering soil grade, and soil compaction from equipment result in root injury for existing trees, making them less durable and less stable.

Magnolia Tree in the Landscape. Photo courtesy Stephen Greer

Studies have also shown that trees growing in groups better survive high winds compared to individual trees. A group was defined as five or more trees growing within ten feet of another tree, but not in a row.

A short list of large maturing, storm resistant trees to consider include live oak, sand live oak, bald cypress, pond cypress, black gum and magnolia.

Do some homework and take a look at tree species that have done well in your area. If you don’t want or need a large tree in your yard, there are many small and medium sized wind-resistant trees from which to choose, like Crape Myrtle and Vitex. Many palms are wind resistant too, particularly the cabbage palm.

Having success with trees in the landscape involves starting with healthy, well-developed trees. Plant the right tree in the right place. Follow good planting procedures, including not planting trees too deep and providing adequate root space to allow for strong, healthy root growth. Practice correct maintenance techniques, which includes learning how to prune to produce a structurally sound tree. Finally, consider if it is time to be proactive and have large over-mature, declining trees removed and replaced before the next storm.

The following UF/IFAS Extension link, Trees and Hurricanes, includes the most current recommendations on tree selection, planting and pruning. https://hort.ifas.ufl.edu/treesandhurricanes/wind_and_trees.shtml

Fall color in the Panhandle

Fall color in the Panhandle

Perpetual Question

Do any of the leaves change color down here in the fall?  The most common answer is that there is none here in the land of evergreens.  The prevalence of oaks (Quercus spp.) and pines (Pinus spp.) see to that.  There is hope. Deciduous trees put on a show as the need for photosynthesis reduces. Chlorophyll production stops replaced with anthocyanins and carotenoids.  As they take over, the beautiful display we all love begins. Several tree species thrive in the panhandle and have great autumn foliage. Once you know which, you’ll see a color pallet that would make DaVinci himself drool.   

Tree for all seasons

Sweet gum (Liquidambar styraciflua) is a larger tree growing upwards of 75 feet tall with a 50 foot spread.  The canopy has an early conical shape which evolves into an oval as the tree ages. This tree is excellent for local parks and to provide shade in your front yard.  Red tinged flowers produced in spring combined with multi-shaded leaves provide interest throughout the year.  However, autumn this tree comes into its own. As the days shorten and cool these leaves begin their journey to the ground by taking on shades of yellow, orange, red, or burgundy.   

IFAS photograph Heather Kalaman

Panhandle Delight

A unique tree growing primarily in the Panhandle, the Florida maple (Acer floridanum) puts on an excellent autumn show.  At that time of year, the leaves will change to a muted yellow or orange color.  Reaching 60 feet high and 30 wide this oval canopied tree is ideal for shade or along streets.  Fall is the only time you will see color changes from this tree, but in summer you’ll be treated to that classic maple leaf shape.

IFAS Photograph

An Oddity of a Tree

The bald cypress (Taxodium distichum) is a tree rife with oddity.  Growing at times as high as 80 feet with a roughly 35 foot spread these trees excel in your lawn. Be wary as when grown in wet environments they develop “knees” thought to help aerate roots in standing water. Ball shaped cones are the primary reproductive organs of this tree. For the purposes of this article, we’ll focus on the color changing needles.  When winter is nigh, they change from pale green to an eye catching yellow or rusty copper. One of the few deciduous conifers, the needles will fall off revealing peeled bark for winter interest.

IFAS Photograph Kathy Warner

To Sum it Up

These are but a few of the trees in north Florida known to change color in the autumn. The list is not overly exhaustive, but there are several in this category.  For more information on landscape trees, see this Ask IFAS document, or contact your local extension agent for additional information on this and any topic regarding your gardens and more.