by Julie McConnell | Dec 18, 2024
Before my career in Extension, I spent ten years selling plants. I worked at a 40-acre nursery that was filled with thousands of plants. The selection was enormous and it was an eye-opening experience, even for a horticulturalist, to see how many different types of the same plant species were on the market. I learned quickly that if someone came in and said, “I need a daylily,” “I need a hydrangea,” or “I need a loropetalum” there were a lot more questions that needed to be asked to help them properly!
Plant breeders in ornamental horticulture spend their careers selecting plants for winning features that gardeners will line up to buy. Examples of traits include flower color, repeat flowering, mature size, disease resistance, cold hardiness, sun/shade tolerance, and foliage color. There are a lot of steps between recognizing what might be a superstar and availability in your local garden center, but let’s just jump to the part where they are in the garden center.
When shopping for plants, always look for the full name of the plant, preferably the botanical name which will include genus and species in Latin. Some plants are grown from seed and may have some variation in features. For example, a live oak grown from an acorn will be named with only genus and species, Quercus virginiana. The mature growth habit will have a wider range than one that was cultivated from a parent plant with known features. The species could be smaller than average, larger than average, an interesting branching feature, etc. Think of your own family, kids from the same parents may have different eye color, hair color, and height but they are all human children!
A cultivated plant is grown from cuttings or similar propagation methods that create a genetic clone of the originally selected plant. It is considered a cultivar if it will not grow true from seed and needs human intervention to result in the identical characteristics as the parent plant. The botanical name of a cultivated plant will follow the italicized species and is written/typed in single quotes. Note, since many plants are trademarked, there may be a botanical name that isn’t very flashy followed by a similar name, with some marketing flair. Let’s look at a couple of examples:
As you can see, just asking for a Loropetalum can result in vastly different plants!
Relying on common names only can also lead to an unintentional purchase. The same common name may be used for two very different plants. Another issue is that closely related species may have different places of origin and if you are trying to use only Florida native plants that could impact your design plans. Here are a couple of examples:
The takeaway message is always look for botanical names and do a little homework when purchasing plants. Ensure the plant you are looking at has the features that match your landscape needs!
by Beth Bolles | Dec 13, 2024
When looking for a small tree that provides a visual impact in the landscape, nothing beats a Japanese maple.
In North Florida, we have landscapes with some suitable conditions for growing a Japanese maple but these trees are not for every site. Japanese Maple plants prefer some shade, especially in the afternoon, and protection from winds. If you have a high tree canopy that allows for filtered sun throughout the day, many cultivars will grow well with this light. Soils should be moist but well drained with good organic matter. Areas with higher pH soils such as home foundations or around concrete patios usually show plants with poorer growth and nutrient issues.
This specimen is suited to its spot with acid soil with a high Live oak tree canopy. The fall color is beautiful. Photo by Beth Bolles, UF IFAS Extension Escambia County.
Many people love the leaf color of Japanese maples, either burgundy leaf forms or selections with beautiful fall color. The palmate leaf shape also adds interest, along with varying degrees of coarse to finer textures.
My favorite characteristic of the Japanese maple is the growth form. Trees often have a layered appearance with branches extending outward, making a beautiful small canopy. Many selections have smooth bark but one cultivar, the Pine bark maple, has plated bark that looks like a pine tree.
Pine bark Japanese maple form and fall leaf color. Photo by Beth Bolles, UF IFAS Extension Escambia County.
Interesting bark of the Pine bark maple. Photo by Beth Bolles, UF IFAS Extension Escambia County.
Although the growth rate is slow to moderate, be sure to research the plant size of the cultivar you want. There are small tree forms that will reach an average of 20 feet and plants that only grow about 5 feet in twenty years. Our cool season is the best time to plant a Japanese maple if your landscape is suited for this tree.
by Joshua Criss | Nov 21, 2024
A Sea of Yellow
You do not often see a sea of yellow flowers on what was recently a field of row crops in North Florida. In this instance, the culprit is a cover crop called sunn hemp (Crotalaria juncea). Cover cropping, or green manure as it is sometimes known, is not a new concept. It is a great method for improving soil quality, adding organic matter, augmenting nitrogen supply, supporting pollinators when resources begin to wane, and combating nematodes. Incorporating this sustainable agriculture practice into home vegetable gardens is an excellent method to build long-term viability and production.
Many plants may be used in this capacity, but this article will focus on sunn hemp. This annual is an herbaceous, short-day flowering plant in the Lamiaceae or legume family. Its erect stems produce a great deal of biomass and, as a legume, will augment nitrogen stores within your soil profile. As if that wasn’t enough to sell you, this plant is also known to suppress nematode populations. Native to India and Pakistan, where sunn hemp is grown for fiber, this plant grows well in tropical and temperate environments. It will thrive in even sub-par conditions and requires little fertilizer input.
UF/IFAS Photo: Josh Criss
Seed Time
Seed this plant once your summer gardens have begun to wane. The shorter day length will keep the plant confined to about 3-4 feet while still allowing it to flower. It may also be planted earlier in the year to maximize below-ground biomass and add organic matter. In this scenario, the plant will likely grow to 7 feet tall with a closed canopy within 10 weeks.
Sunn hemp requires little fertilization as it is a legume, a plant family known to fix nitrogen from the atmosphere. This same mechanism is one of the features of this plant as a cover or green manure crop, as it can add up to 320 pounds of nitrogen per acre back to the soil when planted en masse.
Seeding rates within a home garden are much smaller. A farmer may plant 30-50 pounds of seed, which is not practical in small-scale growing. Instead, aim to cover the garden area through broadcasting seed, as a denser planting will reduce the later branching of this plant. Ensure you have 8-12 weeks of warm, frost-free weather, and terminate them prior to reaching the full bloom stage. Doing so will provide your gardens with the same benefits seen in farm fields utilizing this sustainable practice.
UF/IFAS Photo: Josh Criss
To Sum it Up
Sunn hemp is an excellent plant for your gardens before your fall greens. The biomass it produces and the nitrogen it recovers make it very attractive to farmers and should raise eyebrows even in the home garden. The trick is learning to manage this plant within your crop rotation. For more information on soil management refer to these IFAS documents, or contact your local extension agent for additional information on this and any topic regarding your gardens and more.
by Beth Bolles | Nov 13, 2024
Although not native to Florida, the Loquat or Japanese plum is adapted to North Florida conditions. Unlike its relatives, apple, peach, and pear, the loquat is an evergreen tree providing a tropical look with attractive dark green leaves.
Flowers appear in Fall and are pollinated by many insects. Orange fruits are ready for harvest in spring if temperatures have not been too cold.
Bees will visit loquat flowers in the fall. Photo by Beth Bolles, UF IFAS Extension Escambia County.
Loquat trees can reach 20 to 25 feet in height with a good spread. Seedling trees will produce fruit but improved flavors are available with different cultivars.
One of the loquats in the Escambia County Demonstration garden was damaged by a hard freeze and succumbed to a secondary bark beetle attack the following spring. The 2nd tree is thriving as a key feature in the tropical garden. The downside to the location of our tree is that is surrounded by informal walkways that can get messy from fruit that falls in the spring. This may be a consideration when you install your own loquat tree.
Loquat at Escambia Extension. Photo by Beth Bolles, UF IFAS Extension Escambia County
by Daniel J. Leonard | Nov 13, 2024
One of my favorite landscape plants is blooming right now in Panhandle landscapes – ‘Soft Caress’ Mahonia. ‘Soft Caress’ was first introduced into the commercial nursery trade in 2006 and included in the Southern Living Plant Collection, but didn’t achieve garden fame until 2013 when it won first place in the Royal Horticultural Society’s (RHS) prestigious Chelsea Flower Show. I first planted a group of ‘Soft Caress’ about ten years ago and as those plants have matured, so too has my appreciation for them. The following are a couple of my favorite outstanding aspects of these small shrubs.
Fall Flowers. Other than camellias, there isn’t a lot else in Panhandle landscapes blooming from mid-November to January and ‘Soft Caress’ Mahonia helps fill that flower void. Brilliant yellow flower spikes rise above the deep-green fernlike foliage and very welcome in this otherwise drab and dreary gardening season.
‘Soft Caress’ Mahonia’s winter flowers are excellent pollinator attractors. Photo courtesy Daniel Leonard.
Quick growing but small statured. If you’ve gardened very long, you’ll know this is a tough ask! Plants that reach mature size relatively rapidly but also don’t get very big are a rare breed. ‘Soft Caress’ Mahonia grows quickly but also maxes out in size rather quickly – mine are very easily maintained at 3-4’ in height with a single annual trim.
~10-year old ‘Soft Caress’ Mahonia Shrub. Photo courtesy Daniel Leonard.
Extremely tough and adaptable. My Mahonia plants have persisted through drought, hurricanes, floods, and freezes and have never looked better. These little plants are simply tough. They’ve had no disease issues and no pest problems (except for a little deer browsing one year, but that appears to be an isolated incident). While they prefer shade, they can also handle several hours of morning sun without incident.
‘Soft Caress’ Mahonia is a standout plant that fills a mostly flowerless period in landscapes, fills its designated landscape spot quickly but won’t outgrow it, and is truly tough. Add a couple to your landscape this winter!
by Julie McConnell | Oct 31, 2024
A recent visit to the Dothan Area Botanical Garden (DABG) reminded me that although many of our summer flowers are winding down, we have a great garden show coming this winter when the southern classic camellias start to show their stuff. DABG has a large collection of camellias that will start blooming in the coming months. Here is a little background on the two most common types of camellias grown in our area.
Camellia japonica
Also known as Japanese Camellia, C. japonica thrive in partial sun to full shade. Direct morning sun with some shelter from the sun in the hottest part of the day is a good compromise. Too much shade can reduce flowering, so aim for at least partial sun.
Most Japanese Camellias bloom from January to March, but some may start earlier in the season. Flower shapes include single, semi-double, anemone, peony, and formal double. Flower colors are white, pink, red, and sometimes a combination of multiple colors! Camellia japonica mature at 10-15’ tall and wide but may get as big as 25 feet. This makes them ideal to create privacy in the garden or have the lower limbs trimmed into a tree-form.
Camellia sasanqua
Sasanqua camellias also prefer part sun but can also thrive in full sun once established. Leaves and flowers are typically smaller than C. japonica which is an easy way to differentiate. Although most have upright habits and can grow 10-15’ tall as well, there are a few cultivars such as ‘Shishi Gashira’, ‘Bonanza’, and ‘Mine-no-yuki’ that have more horizontal branching making them good options for foundation plantings. Sasanqua camellia are usually in full bloom in the fall, but may bloom as late as January. Flower shapes are similar to C. japonicas, but many varieties have more open flowers with exposed stamens that are beneficial to pollinators.