Sunflowers, Helianthus spp., are a great choice for gardeners who are looking for some cheerful color in their landscape. Here in Florida, we have the main ingredient for success, lots of sunshine!
Skyscraper Sunflower. Credit: Ray Bodrey, UF/IFAS Extension.
Sunflowers are short-lived annuals. A good average time between planting and bloom is roughly 65 days. You can typically plant sunflowers in Florida beginning in late winter until early fall. Only the coldest months are the issue, and for most years that’s only a couple of months for us. Sunflowers can be planted almost anywhere there is full sun. The major selling point to plant sunflowers is of course the impressive blooms (figure 1). These yellow to sometimes orange or red petaled flowers develop a central seed disc, with most varieties having approximately an 8” diameter in growth.
Skyscraper sunflowers planted in close pattern. Credit: Ray Bodrey, UF/IFAS Extension.
As for planting, you may choose to plant narrow rows and close seed spacing in order to cull less preforming plants later. A final row and seed spacing of 2’-3’ is recommended for full height and development of most varieties. However, you may choose to plant in a bed, using a close pattern as seen in figure 2. In any event, sunflowers are easy to propagate by seed and are very low maintenance. However, powdery mildew and spittle bugs can be a nuisance. A general garden fungicide and insecticide will help if problems occur.
Sunflowers, Helianthus spp. Credit: Ray Bodrey, UF/IFAS Extension.
Sunflowers are available in many varieties, which consists of different color blooms and plant sizes. These sizes range from dwarf (1’-3’) to tall (10’-15’) varieties (figure 2). You may wish to stake taller varieties at some point, as some plants will tend to lean with no wind break in place. Here’s a few gardening variety common names to look for: sunbright, sonja, sunrich lemon or orange and autumn beauty. Seed companies also have mixes available in packets. For tall plants, mammoth or skyscraper varieties exist.
Beach sunflower. Credit: Ralph Mitchell, UF/IFAS Extension.
If you are fond of the sunflower bloom and looking for a groundcover, there are a couple of native perennials that fit this category. Beach sunflower, Helianthus debilis or swamp sunflower, Helianthus angustifolius, are groundcovers/ornamentals for landscapes and thrive in dry, hot climates and in a range of soil types. They also are great pollinator attractors.
For more information, contact your local county extension office. Happy Gardening!
Black-eyed Susan, Rudbeckia hirta, is a yellow wildflower commonly found throughout Florida. It is easily recognized by its golden yellow petals and dark brown center or its signature “black eye”. Not only is black-eyed Susan a beautiful addition to any landscape or garden, but it is also beneficial to pollinators and easy to care for! A win, win for gardeners alike!
As a native wildflower to much of the eastern and central United States, Black-eyed Susan plays an important role in supporting local ecosystems. It provides pollen and nectar to a wide variety of pollinators such as native bees, butterflies, hoverflies, and other beneficial insects. Its long blooming season provides a food source to support these species during the hot summer months when many other plants are not blooming.
One of the greatest appeals of Black-eyed Susan is its versatility. It can be grown in full sun and well-drained soil but will tolerate poor soil, drought and even some shade. After establishment, it requires minimal care and returns each year.
Growing Considerations:
USDA Hardiness Zones 2-11
Soil pH range: 6.0-7.2
Soil tolerances: clay; sand; acidic; loam
Plant spacing: 12 – 28 inches
Moderate drought tolerance
Flowering months: May – October
Growth height: 1-3 feet
If you’re looking for a resilient, beautiful, pollinator-friendly flower that brings bold color during the summer and is easy to care for, Black-eyed Susan is a great option!
Beach sunflower is an attractive coastal plant that is well suited for many landscapes. The native plant can thrive in hot and dry spots where other plants may struggle. Learn more about Beach sunflower, Helianthus debilis, and how to use it in your landscape.
It’s that time of year when you bump into a bumble bee and watch butterflies fluttering around as you water the garden. If you’re like me, you’ve been waiting patiently for butterflies to start laying their eggs. Butterflies and moths lay eggs on specialized plants that caterpillars depend on once they hatch. These host plants provide caterpillars with food, shelter, and protection- and they can be anything from a small weed to a tall oak tree.
Freshly hatched Gulf fritillary on passionflower
Monarch butterfly on echinacea
While host plants feed caterpillars, nectar plants feed butterflies. Host plants are specific to each butterfly or moth, while nectar plants attract and feed many different species. Provide a variety of shapes, sizes, and colors of flowering plants to attract different butterflies. To support all life stages of butterflies it’s important to have both host and nectar plants in your garden.
Keep an eye out for signs of caterpillars on your host plants and remember that these plants are meant to be eaten! Because caterpillars feed exclusively on their host plants, they won’t harm the rest of your landscape. Before you reach for pesticides when you see leaf damage, take a moment to identify what’s causing it. It may just be hungry caterpillars getting ready to transform into butterflies. For more information see this EDIS publication about butterfly gardening in Florida, https://edis.ifas.ufl.edu/publication/UW057.
Zebra longwing caterpillar on passionflower
Want to support both caterpillars and butterflies with one plant? Try passionflower! Florida is home to 6 native species of passionflower. Maypop or wild passionflower, Passiflora incarnata, is the showiest of these. Flowers of pink and purple cover the passionflower from the summer to fall, offering nectar for bees, butterflies and hummingbirds. Passiflora species are host plants for the zebra longwing and gulf fritillary caterpillars.
If you love wildflowers, the Fall season has so many plants for you to enjoy. We often think of wildflowers as those in natural settings, on roadsides, or in drainage spots. Here are a few wildflowers that make excellent landscape additions.
Goldenrods (Solidago spp.) are everywhere and the yellow blooms are stunning. If all the incorrect information about goldenrod as an allergy causing plant never existed (ragweed is the main culprit), we would see selections of goldenrod available in every commercial outlet. Many selections have an upright growth so add goldenrod against fences, in back of borders, or large clumps in sunny areas of your landscape.
Goldenrod as a landscape feature at Escambia Demonstration Garden. Photo by Beth Bolles, UF IFAS Extension Escambia County
If you have a moist area and love purple, Mistflower (Conoclinium coelestinum) makes a wonderful fall blooming feature. Plants will colonize an area with running stems so it tends to form a large clump in moist soils. You may notice this in ditches on a drive around your county. The clusters of flowers look fluffy and will be present for many weeks in both full sun or partial shade.
A clump of mistflower in a moist plant bed. Photo by Beth Bolles, UF IFAS Extension Escambia County
For dry and well drained spots of your landscape, the Woody goldenrod (Chrysoma pauciflosculosa) is a good choice. The small shrub offers bright yellow fall flowers that extend above a 2 foot tall plant. Plants tend to be evergreen when in the right location and additional new seedlings will emerge each spring if your landscape is suited for this plant.
Woody goldenrod in a home landscape. Photo by Beth Bolles, UF IFAS Extension Escambia County
For those enhancing a butterfly garden, add Purple false foxglove (Agalinis purpurea), a host plant to the Buckeye butterfly. Plants grow well in our acidic well drained soils with a little moisture. Numerous tubular pink flowers occur in the Fall until a frost. Plants reseed well.
The Purple False Foxglove with vivid pink blooms in a natural setting. Photo by Beth Bolles, UF IFAS Extension Escambia County
If you love all the colors and variety of wildflowers, it is a good time for finding seeds and plants to grow your own. Native nurseries and online retailers carry a wide selection for all seasons and many are low maintenance enhancements for our home landscapes. Like any other ornamental or grass, be sure to match the wildflower with your specific growing conditions.
Problem areas in the landscape – everyone has them. Whether it’s the spot near a drain that stays wet or the back corner of a bed that sunshine never touches, these areas require specialized plants to avoid the constant frustration of installing unhealthy plants that slowly succumb and must be replaced. The problem area in my landscape was a long narrow bed, sited entirely under an eave with full sun exposure and framed by a concrete sidewalk and a south-facing wall. This bed stays hot, it stays dry, and is nigh as inhospitable to most plants as a desert. Enter a plant specialized to handle situations just like this – Yarrow ‘Moonshine’.
Yarrow (Achillea spp.) is a large genus of plants, occurring all over the globe. To illustrate, Common Yarrow (Achillea millefolium) is native to three different continents (North America, Europe, and Asia), making it one of the most widely distributed plants in the world. And though it was commonly grown and used in antiquity for medical purposes (the genus name Achillea is a reference to Achilles, who supposedly used the plant as a wound treatment for himself and his fellow Greek soldiers), I and most of you are probably more interested in how it looks and performs in the landscape.
‘Moonshine’ Yarrow foliage.
All species of Yarrow share several ornamental traits. The most obvious are their showy flowers, which occur as large, flattened “corymbs” and come in shades of white, pink, red, and yellow. I selected the cultivar ‘Moonshine’ for my landscape as it has brilliant yellow flowers that popped against the brown wall of the house. Equally as pretty and unique is the foliage of Yarrow. Yarrow leaves are finely dissected, appearing fernlike, are strongly scented, and range in color from deep green to silver. Again, I chose ‘Moonshine’ for its silvery foliage, a trait that makes it even more drought resistant than green leaved varieties.
‘Moonshine’ Yarrow inflorescence.
If sited in the right place, most Yarrow species are easy to grow; simply site them in full sun (6+ hours a day) and very well drained soil. While all plants, Yarrow included, need regular water during the establishment phase, supplemental irrigation is not necessary and often leads to the decline and rot of Yarrow clumps, particularly the silver foliaged varieties like ‘Moonrise’ (these should be treated more like succulents and watered only sparingly). Once established, Yarrow plants will eventually grow to 2-3’ in height but can spread underground via rhizomes to form clumps. This spreading trait enables Yarrow to perform admirably as a groundcover in confined spaces like my sidewalk-bound bed.
If you have a dry, sunny problem spot in your landscape and don’t know what to do, installing a cultivar of Yarrow, like ‘Moonshine’, might be just the solution to turn a problem into a garden solution. This drought tolerant, deer tolerant, pollinator friendly species couldn’t be easier to grow and will reward you with summer color for years to come. Plant one today. For more information on Yarrow or any other horticultural question, contact your local UF/IFAS County Extension Office.
