Light: Full sun is ideal for zinnia growth and flowering. Even in warmer climates with afternoon shadow, they can flower there, but they may be more prone to disease and produce fewer flowers.
Soil: Organically rich, fertile soils with good drainage are ideal for growing zinnias. Because zinnia seedlings are susceptible to rotting in cool, damp soils, having well-drained soil is crucial.
Plant zinnia seeds in rows or clusters spaced a few inches apart. Once the plant has four leaves, thin to 8 to 18 inches apart, depending on the variety.
Planting: Plant zinnias in the spring, just about the time you plant tomatoes, when all threat of frost has passed. Growing zinnias from seeds straight in the garden is simple. Start seeds inside four to six weeks before to your last frost date for earlier flowering.
What month should zinnia seeds be sown?
One of the simplest flowers to plant, zinnias grow quickly and provide a lot of blooms. Additionally, they will continue to bloom right up until the first fall hard frost. Consider trying zinnia flowers this year to add a huge splash of colour to your yard.
About Zinnias
Since zinnias are annuals, they will only produce blooms and seeds for one season before dying. The original plant will not reappear the following year. They are excellent for use as a cutting flower or as food for butterflies since they have vivid, solitary, daisy-like flowerheads on a single, tall stem.
Types of Zinnias
Zinnia elegans, the most widely grown zinnia species, has been developed to produce a large number of distinctive variants.
Single, semidouble, or double zinnia blooms are the three most common varieties. The number of petal rows and whether or not the flower’s centre is visible serve to distinguish between these forms:
- A single row of petals and the centre are both visible on single-flowered zinnias.
- Petal rows abound on double-flowered zinnias, and their centres are hidden.
- Between the two are semidouble-flowered zinnias, which have several rows of petals but discernible cores.
In addition to these shapes, zinnia flowers also occur in “beehive,” “button,” and “cactus” forms. Additionally, the plants themselves come in various heights: taller types function best as a garden bed’s background, while shorter varieties are useful as a border. There is a zinnia for every garden, in fact!
In an annual or mixed border garden, plant zinnias. Smaller zinnias work well as window boxes, edging, or in other containers.
To have a lot of flowers all season long, choose a place that receives full sun (6 to 8 hours of sunlight every day). Additionally, later in the season, foliar diseases like powdery mildew can be avoided by planting in an area with sufficient air circulation.
Although zinnias can grow in a variety of soil types, they prefer organically rich, well-draining soil. The optimal pH range for soil is between 5.5 and 7.5. The blooms will grow more quickly if compost (humus) is added to the soil. Find out more about soil improvements and getting the soil ready for planting.
When to Plant Zinnias
- Because they dislike being transplanted, it is advised that you start your zinnia plants from seed directly in the garden bed. If the correct circumstances are present, they will develop quite quickly from seed.
- It should be noted that zinnias can be grown from seed inside if you like. Just make sure to transfer them gently and young.
- Because zinnias are delicate to frost, wait to plant them until after the last frost in your area. See the frost dates in your area.
- Zinnias can tolerate daily temperatures as low as 60F (16C), although a range of 7484F (2328C) is ideal.
- To prolong the flowering time, sow a new crop of seeds every week or so for a few weeks.
How to Plant Zinnias
- Depending on the kind, place plants 4 to 24 inches apart. (Many common kinds are planted 2 feet between rows and 6 inches apart within the row.) For information about each variety, consult the seed packet’s back.
- Plant zinnia seeds no deeper than 1/4 inch.
- The majority of zinnia cultivars will produce seedlings in just 4 to 7 days, but it may take up to two months or more for blooms to appear (depending on planting site and climate).
- To promote air circulation, thin seedlings when they are three inches tall, spacing them 6 to 18 inches apart. As a result, powdery mildew is less likely to grow.
- To promote development and blossoms, keep the soil’s moisture level moderate and apply a mild fertiliser.
- Deadhead zinnias once they have finished blooming to facilitate the development of new blossoms.
- Since zinnias are annuals, they will perish with the first fall hard cold. Let the final blooms of the season fully mature before dispersing their seeds if you want them to reseed.
Zinnias still not your thing? In your garden, try them out for the following six reasons:
- With cultivars from the Dreamland Series, you can have a full-sized flower on a little plant. These zinnias are compact and dwarf, with stems that are 812 inches tall and totally double flowerheads that can be up to 4 inches across with a variety of colours.
- The dwarf, spreading cultivars of the Thumbelina Series have weather-resistant, solitary or semi-double flowerheads in a variety of hues. Their stems can reach a length of 6 inches, and their petals are 1-1/4″ wide.
- One of the largest and tallest of them all, the State Fair Series has huge, double flowerheads that measure 3 inches in diameter. Stems can reach a height of 30 inches.
- Typically, it takes zinnias 60 to 70 days from seed to flower (though it depends on conditions and variety). They are fantastic in a bunch of flowers!
- The tiny, narrow-leafed zinnias are great for hanging baskets and also make lovely dried flowers.
- Zinnias are considered to represent memories of those who have passed away. Discover more about the significance of flowers here.
- Zinnias may be harmed by bacterial wilt, powdery mildew, and bacterial and fungal spots. To prevent illness, keep leaves from getting too damp and correctly space your plants.
- Problems can also be brought on by caterpillars, mealybugs, and spider mites. Spraying should be avoided unless there is a real infestation because some leaf damage is not a problem.
- Thanks to their resistance to deer, zinnias may be able to prevent surrounding flowers from being eaten.
Can I merely sprinkling zinnia seeds?
Every summer, I overflow my gardens with flowering flowers that last until the fall. It’s lovely, reasonably priced, and best of all, requires little upkeep!
The Zinnia is my secret flower; it’s a magnificent, robust flower that looks fantastic in the garden and makes quick bouquets.
In the spring and summer, you can purchase zinnia plants at nurseries, but it would cost hundreds of dollars to get the same level of coverage as I do with only $15 in seeds! Park Seed sells packets of 50 seeds for $3, and I’ve always had success with them sprouting.
This post is not sponsored, please note. I’ve been a customer of this business for 5 years and am a big fan.
Zinnias are surprisingly simple to grow from seed and require very little maintenance once they are established. Despite the harsh sun, the clay soil, and my inability to water them frequently, they thrive in my front garden.
Early summer to fall, they are in full flower. On November 1 of the previous year, my garden was still partially coloured. In my garden, the Zinna Park’s Pick Mix variety grows 4 to 5 feet tall.
Another advantage? They draw butterflies and birds. The Monarch Butterflies (an endangered breed), Swallowtail Butterflies, and Goldfinch birds have been my garden’s most thrilling guests.
Even planting is a simple operation. I lay down new mulch before scattering the Zinnia seeds in the desired locations. I just spread them; I don’t think about spacing or anything. I add a tiny bit more mulch to the area as cover once the seeds are planted. If there isn’t enough rain, I do water them every few days for about a month or two until the seedlings are well-established.
What Seeds Are Best?
Pick of Zinnia Park Mix the tallest, strongest, and simplest to grow Zinnias. These are positioned behind the house in the garden since they can grow to a height of five feet. Great around fences as well.
I planted a small “dwarf variant” of Magellan Mix Zinnia Seeds around the front of the garden. The bushy, 1.5-foot-tall blossoms are short and slender. fantastic along borders and pathways.
To create the most beautiful zinnia garden:
- Because the leaves are prone to mildewing, water beneath the foliage with a soaker hose, or water in the morning.
- Remove the dead flowers to promote new blooming (called “deadheading)
- To improve plant spacing, transplant some seedlings after they have grown. (I don’t do this all the time.
- To maintain the garden neat, think about staking the tallest plants. The strongest ones can be staked first, followed by tying up the weaker ones with twine along a line that extends to the stake. If they grow too big, they may topple over, and they may appear unkempt, as they did in my garden last summer:
Ordering now will ensure that your seeds arrive by April. Try just one package of seeds for now if you’re unsure. Although seeds can be started indoors, I’ve never been good enough to keep them alive. A few weeks after the last frost, I simply planted the seeds in the ground. In the VA/DC/MD/DE region, April is the best month.
Do zinnia seeds need to be sown in the ground first?
One of the simplest gardening activities of the year might be starting zinnias from seed. Where spring arrives early, don’t directly plant zinnia seeds outside until after the final frost. The seeds should only be sown around 1/4 inch deep. Within four to seven days, seedlings will begin to emerge. To promote air circulation, which is essential for maintaining zinnias in good shape all season, thin the seedlings once they are approximately three inches tall, spacing them 6 to 18 inches apart.
In colder regions, plant seeds indoors four to six weeks prior to the typical last frost date in your region. Before you plant the plants in your garden, harden them off by leaving the trays outside for a few hours each day.
If the zinnia plants you purchase at the garden centre are already the size at which the blooms bloom, you can make the transition to your garden easier by cutting the plants back by one-third. After that, relax and watch your zinnia patch develop and thrive.
can zinnia seeds be saved?
Yes, you can keep zinnia seeds, however if they are a hybrid variety, they might not germinate. When the seeds have ripened, wait for the flowerhead to fade and dry before cutting it off gently. Knock the flowerhead over a piece of paper to let the seeds fall. Remove any petals, allow the seeds to dry, and then store them in a paper bag with a label for the next year.
Are zinnias sun-sensitive?
It’s hot outside, so gardening in the summer calls for plants that are minimal care, drought and heat tolerant, and have vibrant colours.
The better, the brighter.
On each of the three criteria, zinnias were suitable. plus more. They’re among the best flowers that savvy gardeners may use in their gardens, in fact.
If there is a flower that is simpler to grow, please let us know. Since zinnias are annuals, their life cycle from seed to flower to seed is short. Simple garden preparation is all that is needed for zinnias’ arrow-like, pointy seeds to germinate. Simply place them in soil that is well-drained, in full sun, and in an area that receives a lot of summer heat, and you’ll soon see small seedlings and blooming flowers. No enduring can boast of that speed!
One gardening buddy just scatters seeds wherever she wants a few zinnias, watered those areas for a few days, and then lets the zinnias’ naturally easy-to-grow nature take its course.
“Candy Cane,” “Green Envy,” “Persian Carpet,” and “Pop Art.” When a variety has names like those, colour is guaranteed. The ridiculous colour palette of zinnias includes every vivid and pastel shade (aside from blue), as well as bi-, tri-, and crazy-quilt combinations made for cutting, luring pollinators, etc.
Many new zinnia series give options for height and width in addition to vibrant colour.
- While Zinnia elegans tall varieties continue to be the preferred option for the back of the border, shorter series are now challenging the low ground once held by marigolds and petunias. The Thumbelina Series of dwarf zinnias reach their highest point at 6 to 8 inches, whereas the Magellan Series remain roughly knee high at 14 inches.
- The Crystal Series and other creeping or spreading Zinnia angustifolia are a revelation for the front of the border, raised beds, containers, and even ground coverings. The fact that its native to Mexico is even more drought tolerant than regular zinnias makes it the preferred choice for hot locations like sidewalk beds or that no-man’s-land next to the garage.
- With a height of about 8 to 12 inches, ZaharaTM zinnias are renowned for their resistance to powdery mildew and leaf spot (see below). In the entry beds of the Regenstein Fruit & Vegetable Garden, we paired Zahara Yellow, which is brief but sweet, with tiny sunflowers.
Zinnias are obviously meant for the vase because they have style and long, sturdy stems.
The words stars and daisies, dahlias and spiders, buttons and domes, and quill-leaf cactus are all used to describe zinnia blooms. Flowers come in different varieties: “singles,” which have their petals arranged in a row around an open centre; semi-doubles; and doubles. Each one is fantastic in floral arrangements.
The best zinnias for cutting are, of course, the tall kinds; “Benary’s Giant” is renowned for its three-foot-tall, robust stems and huge flowers. Just above a bud joint, angle-cut zinnia stems. Zinnias often stay a long time in a vase; thus, remove all but the most obvious leaves off the stems before placing them in water.
Zinnias require little upkeep. Because they grow quickly, they shade out weeds. They don’t need mulching, and the only fertiliser they need is an occasional application of a well-balanced mix.
Deadheading encourages the growth of additional blooms. Lack of time to deadhead? When it comes to a big bed, the Zaharas indicated in the sidebard are a significant time saver.
The Profusion Series, a cross between Z. elegans and Z. angustifolia, is resistant to powdery mildew, which is the bane of zinnias, just like Zaharas.
Zinnias are accustomed to dry environments because they are indigenous to the grasslands of the southwestern United States, Mexico, and South America. However, wet summers, like the one we’ve had so far, can be damaging. And leaf spot and powdery mildew can result from that. Three recommendations for surviving inclement weather:
- Only water as necessary, and then only at the plant’s base. Wet leaves can encourage the growth of mildew, and water splashing can instantly spread fungus from the ground onto zinnia leaves.
- Taller, mildew-prone kinds can be hidden by foreground plants.
- As one horticultural put it, “Even when zinnias are coated in powdery mildew, they’re covered with flowers,” do both #1 and #2 and accept that zinnia leaves (but not flowers) are impacted by wet weather.
Zinnia seeds can be saved with ease. Simply let the blossoms to completely dry on the stalk, gather the seedheads, and delicately crush them in your fingers to release the harvest of seeds for the following year. In the same manner as other seeds, store in a cool, dry area. (And save some for our seed swap in February of next year in a labelled envelope!)
Last but not least, zinnias attract butterflies, so plant them every year. The plants with larger flowers serve as landing places for butterflies looking for nectar. (The same is true with hummingbirds.) To capture the most attention, try tall zinnias with scarlet or hot pink blossoms.
Living and gardening in Oak Park, Illinois, Karen Zaworski is a writer and photographer who specialises in gardens.
‘Benary’s Giant,’ one of the greatest for cut flowers, stands out in the English Oak Meadow with its 1,000 blooms.
Above: Double Zahara Fire (Zinnia marylandica), one of a group of plants resistant to powdery mildew, was cultivated in the Enabling Garden.
For your summer garden, the ZaharaTM Coral Rose Zinnia (Zinnia Marylandica) excels and requires little water.