Zinnias are well-known annual flowers, primarily recognized for their easy and fast growth. Their wide range of growing habits contributes to their popularity, as they can range from short and bushy to tall with a singular stalk. Regardless of their growing habit, Zinnias are prolific bloomers. They belong to the aster family and are native to Mexico and Central America, thriving particularly well throughout the South.
Photo: De’Anthony Price
Zinnia Characteristics
There are three distinct types of Zinnias based on floral structure: single, double, and semi-double. The different floral structures do not necessarily correlate with plant habits. ‘Single’ refers to flowers that have only a single row of petals, with the center of the flower clearly visible. ‘Double’ Zinnias have multiple rows of petals, and the center is not clearly visible. ‘Semi-double’ cultivars exhibit a combination of traits, with flowers having multiple rows of petals while still maintaining a clearly visible center.
Pollinators and Zinnias
Zinnias are great for attracting pollinators, especially butterflies. Interplanting zinnias between rows of vegetables or as a border around vegetables is a great way to attract more pollinators to your garden. There are a few guidelines available for attracting butterflies to your yard using zinnias. The taller varieties are better than dwarf or compact cultivars, and those with wide, flat blooms provide a larger landing surface. Flowers should have prominent yellow centers (disc floret); double bloom varieties make it difficult for butterflies to access nectar. It is also possible that some varieties attractive to butterflies produce a larger quantity of and/or better-quality nectar than others.
Photo: UF/IFAS
Planting Zinnias
Zinnias perform better in garden beds than containers and, due to their ability to grow so quickly, can be direct seeded. To direct seed, the soil temp should be at least 70 degrees and plant the seeds at 1/4’” deep. Zinnias can also be planted as transplants and should be done once the soil warms to 60 degrees. Plant spacing can be anywhere from 8 to 12 inches depending on the plant’s habit. Singular stalk varieties can be planted closer together and bushier varieties should be given more space. Zinnias prefer full sun and well-drained soil. For longer flowering, remove the old blooms.
Zinnia Management
When planting zinnias, it’s recommended to incorporate a general-purpose fertilizer with equal parts nitrogen, phosphorus, and potassium into the soil. Following planting, monthly fertilization with a phosphorus-rich fertilizer is advisable to encourage continuous blooming. Maintaining adequate moisture is crucial for zinnias but avoid overwatering as they thrive in moderately dry conditions. To prevent fungal diseases, water only when the top 1-2 inches of soil are dry, focusing on watering the base of the plant rather than the foliage whenever possible. Powdery mildew is a common issue with zinnias, but it can be managed by applying a fungicide when necessary. However, it’s best to prevent this problem by ensuring good air circulation and avoiding wet foliage.
Photo: De’Anthony Price Diseased Zinnia
Zinnias as Cut Flowers
Zinnias, known for their vibrant charm, make delightful cut flowers that can brighten up indoor spaces for a week or longer. For optimal longevity, harvest the blooms when their centers are just beginning to unfurl fully. Trim away lower leaves and promptly place the cut ends into water-filled vases. Regularly refreshing the water helps prevent the growth of algae. When it comes to drying zinnias, double-flowered varieties are preferred as they tend to maintain their shape better than single forms. While all colors undergo slight changes during drying, cutting stems at their peak, removing leaves, and hanging them upside down in bundles away from direct sunlight facilitates the drying process effectively.
Rudbeckia hirta, commonly known as black-eyed Susan, is a vibrant and hardy wildflower with golden-yellow petals and a dark brown central cone. Photo by kburgess, Adobe Stock.
Florida’s diverse ecosystem showcases a remarkable array of native wildflowers that burst into vibrant colors, particularly during the spring season. Cultivating these indigenous blooms not only enhances the beauty of your lawn but also fosters biodiversity. Florida’s spring landscape comes alive with a vibrant tapestry of native wildflowers, each species contributing its unique charm to the natural scenery.
Yellow, a color that beckons pollinators, especially bees and butterflies, is a prevalent hue among these wildflowers. Many have evolved to showcase bright yellow tones, attracting pollinators, and ensuring the vital transfer of pollen for the continued existence of the plant species. In this spotlight, we’ll explore a selection of my favorite yellow-blooming wildflowers: Leavenworth’s tickseed, dune sunflower, and black-eyed Susan.
Leavenworth’s Tickseed
Leavenworth’s tickseed showcases brilliant yellow flowers with distinct maroon markings, contributing to its charm as a cheerful and attractive wildflower in gardens and meadows. Photo by Sunshower Shots, Adobe Stock.
Coreopsis, Florida’s state wildflower, boasts 14 native species flourishing in North Florida. Among these, Leavenworth’s tickseed (Coreopsis leavenworthii), predominantly found in Florida, graces the Panhandle region with its distinctive yellow, daisy-like flowers adorned with dark centers and scalloped yellow ray florets.
Thriving in open areas, flatwoods, and prairies, this annual or short-lived perennial becomes a beacon of color in the spring landscape. Ideal for wildflower gardens, Leavenworth’s tickseed requires adequate space for reseeding, best achieved by planting one to two feet apart in the spring for optimal flowering. The plant quickly establishes itself in moist soils, benefiting from occasional pruning or mowing to encourage a second flush of flowers.
Preferably rooted in sandy, well-drained soil, Leavenworth’s tickseed demands full sun exposure for maximum flower production, with moist soils playing a pivotal role in reseeding and maintaining this distinctive species.
Beach Sunflower
Adapting well to both coastal and inland environments, the beach sunflower attracts butterflies and other pollinators with its vibrant blooms. Photo by Nahhan, Adobe Stock.
The beach sunflower (Helianthus debilis), also recognized as the dune sunflower, is renowned for its coastal charm and nearly year-round blossoms. Adapting gracefully to both coastal regions and inland landscapes, this sunflower showcases two-inch flowers resembling daisies or sunflowers, boasting yellow petals and brown centers. A captivating trait is its tendency to follow the sun throughout the day.
When cultivating beach sunflowers, it is essential to allocate ample space for their spreading nature. To maximize visual impact, consider planting them in masses, maintaining distances of three to four feet between each plant. As beach sunflowers may become unruly over time, periodic removal of old stems is advisable. Encouraging new plants to sprout from seeds contributes to a healthier growth pattern. Light trims every three months can further enhance the foliage’s vibrancy and overall maintenance. While acting as an annual in freezing temperatures, the beach sunflower generally reseeds itself and displays admirable tolerance to coastal elements, including salt and wind.
For optimal growth conditions, planting in full sun encourages abundant flowering, although the plant can tolerate light shade for part of the day. Preferably, choose well-drained sandy soils, avoiding persistently moist conditions to ensure the overall health and vitality of the beach sunflower.
Black-eyed Susan
Black-eyed Susans are not only visually appealing but also serve as valuable nectar sources for pollinators, attracting butterflies, bees, and other beneficial insects to the garden or natural habitat. Photo by Green Stock Creative, Adobe Stock.
Black-eyed Susan (Rudbeckia hirta), a classic native bloom, captivates with its widespread availability and versatile nature as an annual, biennial, or perennial. This resilient plant grows to a height of one to two feet, showcasing rough-textured leaves and deep-yellow aster-like flowers with dark brown disk flowers forming a central dome.
When incorporating black-eyed Susans into your landscape, consider their suitability for mixed wildflower beds, where they effortlessly self-seed in open or lightly mulched areas. Maintaining proper spacing of 14 to 18 inches between plants, vigilant monitoring during extended dry periods, and providing deep watering, when necessary, contribute to the overall health and vitality of these iconic blooms.
Thriving in well-drained soils, black-eyed Susan showcases adaptability to various soil types. Whether exposed to full sun or partial shade, the plant optimizes its blooming potential, enhancing the visual appeal of any landscape.
Encourage Wildflowers in Your Landscape
Selecting native wildflowers adapted to your landscape’s specific soil, light, and drainage conditions is crucial for success. If initial attempts fail, try different species until you find the perfect match, emphasizing the importance of using the right plant in the right place. Thorough watering aids in establishment, but once native wildflowers are established, they generally require minimal irrigation. Avoid overwatering to prevent fungal and rot issues.
Native wildflowers in Florida typically do not need additional fertilization, as it can lead to rapid growth and increased susceptibility to pests and diseases. Embrace the natural resilience of these plants by avoiding unnecessary fertilization. Encourage the persistence of wildflowers by embracing self-seeding, maintaining open, lightly mulched areas for natural germination, and being vigilant when weeding.
Florida’s spring blooming wildflowers, including Leavenworth’s tickseed, beach sunflower, and black-eyed Susan, contribute to the state’s biodiversity. Selecting the right species and providing proper care allows us to cultivate these native blooms and actively participate in conserving Florida’s precious ecosystem.
In the ever growing urbanization of our world today, green spaces are hard to come by but are so essential to biodiversity conservation. Pollinators, such as bees, butterflies, and birds, play a crucial role in our ecosystem by facilitating plant reproduction. Unfortunately, pollinator populations are declining due to habitat loss, pesticide use, and climate change. However, by making simple changes to your garden, you can create an environment that supports and protects your pollinators. In this article, we will discuss ways to turn your garden into a pollinator paradise.
Gulf Fritillary butterfly on flower. Photo taken 09-26-22. UF/IFAS Photo by Cat Wofford.
Choosing Native Plants
Native plants are adapted to the local climate and soil conditions, making them ideal for supporting native pollinators. Research native species that thrive in your region and incorporate them into your landscape. Aim for a diverse selection of flowers that bloom at different times throughout the year to provide a continuous food source for pollinators.
Flowers and insects at the student gardens on the University of Florida campus. Pollinating bee. UF/IFAS Photo by Tyler Jones.
Providing Shelter and Nesting Sites
Pollinators need more than just nectar-rich flowers; they also require sheltered spaces for nesting or overwintering. By incorporating features such as brush piles, dead trees, and nesting boxes you are creating habitat diversity for the pollinators. Leaving some areas of bare soil for ground-nesting bees and providing water sources like shallow dishes or birdbaths can further enhance your garden’s appeal to pollinators as well.
Avoid Chemical Pesticides
Chemical pesticides not only can harm pollinators, but they can also directly disrupt ecosystems. Instead of reaching for a spray on the shelf to deter pests, consider using a natural pest control method such as companion planting, handpicking pests, and encouraging natural predators like ladybugs and birds. Certain organic gardening practices not only protect pollinators, but can also promote your garden’s overall health.
Embrace Imperfection
A manicured garden may look appealing, but it can be sometimes inhospitable to our pollinator friends. Create a more naturalistic approach by allowing certain areas of your garden to grow wild. Letting plants go to seed, leaving some leaf litter, and allowing flowers to fade and form seed heads provide valuable resources for pollinators throughout their life cycle.
A butterfly garden at a Florida-Friendly Landscape. UF/IFAS Photo taken by Cat Wofford 9-29-23
Educate and Inspire Others
Because pollinator numbers have rapidly declined in recent years, awareness and education of their importance to our ecosystem is crucial. Spreading the word of their importance and how you can contribute to conservation efforts truly helps the cause. UF/IFAS Extension has made great efforts in hosting workshops, giving presentations, and sharing information through newsletters and social media about the importance of creating pollinator habitats. We encourage you, your neighbors, friends, and community members to join in the movement of creating pollinator-friendly gardens and landscapes.
By transforming your garden into a pollinator paradise, you not only enhance its beauty, but also play a vital role in conserving biodiversity. Every flower you plant and every habitat you create contributes to the well-being of bees, butterflies, birds, and other pollinators. Together, we can make a difference and ensure a thriving ecosystem for generations to come.
Migratory animals are no stranger to our neck of the woods. Every year, Florida is host to countless creatures as they make their way from one place to another in search of food, nesting sites, or just a change of scene. From hummingbirds to manatees, it can be interesting to watch the annual cycle of nomadic animals.
A gulf frittilary butterfly.
One of the smaller wayfarers we see year-round, but especially when they migrate south in the fall, is the gulf frittilary butterfly, Agraulis vanillae Linnaeus. They spend the warmer months of the year in the southeastern United States, following frost-free weather as temperatures drop. During the winter, they enjoy the sunshine of peninsular Florida.
The gulf frittilary is a medium-sized butterfly, with a wingspan of 2½–3½ inches. Females are larger than males. It is bright orange in color, with black markings on the top of its wings and silvery-white spots on the bottoms. In its larval form, it is also bright orange in color, with dangerous-looking spines along the length of the caterpillar. Despite their appearance, these do not sting.
The gulf frittilary caterpillar looks dangerous, but won’t sting. Please do not eat it, however.
If given a choice its larvae will feed primarily on passionflower (Passiflora incarnataand related species), but have also been seen snacking on buttonsage. Toxins from passionflower concentrate in the larvae and butterflies, making them poisonous to predators – much like the monarch butterfly and its host plant, milkweed. The insect’s bright coloration serves as a warning that it is not to be eaten.
Keep an eye out for these beautiful butterflies and consider planting a passion vine in your landscape to help them out. The caterpillars may eat the leaves, but in giving them a feast you’ll help them grow into adult butterflies. Once they do mature, they are fantastic at pollinating many of our native wildflowers, further beautifying the world around them.
For more information see the University of Florida’s article here.
Throughout the year, people with citrus trees of any sort may notice some damage to the leaves. Chewing damage, which leaves pieces of the leaf missing, is a common sight. The likely culprit for this type of damage is an insect that is very common in our area, but seems to have multiple personalities!
The adult form of this peculiar creature is the giant swallowtail butterfly, Papilio cresphontes Cramer. A large black-and-yellow butterfly, it is found throughout the country east of the Rocky Mountains, and is present in north Florida most months of the year. Adults spend their days as many other butterflies do, flitting from flower to flower in search of nectar. They are attracted to a wide variety of blossoms, pollinating as they go.
The giant swallowtail butterfly. Photo courtesy of Donald Hall, University of Florida
Females lay tiny round eggs individually on the surface of plant leaves. Though their larvae may eat numerous types of leaves, one of their favorites seems to be those of citrus trees. This means that though the adults may be considered beneficial as pollinators, their caterpillars are often thought of as pests.
Bird poop or caterpillar? The orange dog caterpillar is, in fact, a caterpillar.
Similarly, the beauty of the adult butterfly is quite different than the appearance of their younger selves. The caterpillar of the giant swallowtail, often called the ‘orange dog’ caterpillar, relies on camouflage to keep itself safe. Even with this it displays multiple personalities, so to speak. Larvae of any age may be mistaken as bird droppings on a leaf. Their irregular patches of white and brown make them look like the leavings of a passing avian, which predators are probably likely to pass over. Older caterpillars have another trick up their sleeve, with markings on their head that mimic the head of a snake. Disturb one enough and it may even flash a forked, bright orange protuberance called the osmeterium, which may resemble the tongue of a snake. This gland also emits a musky odor to make the insect even less attractive to potential predators.
Snake or caterpillar? The osmeterium might look like a snake’s tongue, but don’t be fooled. Photo courtesy of Donald Hall, University of Florida
Whether wearing a beautiful, ugly, or scary face, these insects are here to stay. Thankfully, they don’t often do enough damage to citrus trees for homeowners to worry about. Young trees in danger of being defoliated may need some protection, but an established tree can lose a leaf or three with no issues.
If control is called for, hand-picking the caterpillars is a viable option, as long as the tree is small enough to reach the branches. A product called Bt, short for Bacillus thuringiensis, is another option. Applied to the leaves, this insecticide only affects caterpillars, and shouldn’t harm other pollinators.
