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 color 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 center is visible serve to distinguish between these forms:
- A single row of petals and the center are both visible on single-flowered zinnias.
- Petal rows abound on double-flowered zinnias, and their centers 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 fertilizer.
- 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 colors.
- 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.
How long till zinnias start to sprout?
The color and size of annual Zinnias cannot be disputed. Plant zinnia seeds in common garden soil with good drainage, but add substantial amounts of well-rotted manure the fall before. For bushier growth later in the season, pinch off developing tips early. Water frequently, trying to keep leaves as dry as you can. Regular deadheading Feed your plants once in the early spring and once blossoming has started. For advice on how to grow zinnia from seed, continue reading below.
Timing After the last frost, direct sow. Although zinnias don’t transplant well, they can be started indoors in peat or coir pots 6 to 8 weeks prior to planting outside, if necessary. Keep the soil between 21 and 26 °C (70-80F). In 5 to 24 days, seeds should start to sprout.
Starting The final plant spacing should be 25–30 cm (10–12) apart for Zinnia seeds.
Growing The first flowers often appear two months after seeding, depending on the cultivar. Take regular cuttings of zinnia stems from mid-summer through the fall to enjoy indoors. Cutting seems to stimulate the plants for greater vigor and promotes the growth of fresh blossoms. In late summer, look out for powdery mildew symptoms on the leaves. To avoid mildew, try to avoid overhead watering.
How can you identify a seedling?
When recognizing seedlings, first look at the cotyledon count and leaf form, then check for hairs. While other characteristics like color can be instructive, they frequently differ amongst seedlings of the same species, particularly when seedlings are located in different locations and receive varied quantities of light and water.
sowing zinnia seeds
Because zinnias are known for hating root disturbance, it is better to direct seed into finely tilthed, easily draining soil. If you want to sit outside in the evenings, wait until May or June to do this. It’s still too cold if the evenings are cool enough to make you want to eat dinner indoors rather than outside. Your zinnias should be planted in a greenhouse or polytunnel if you reside in a region of the country where eating outside only happens once every five years.
Choose a sunny area, scatter two or three seeds there, 5 cm (2 in) apart, and space each cluster about 30 cm (12 in) away. When the seedlings appear, thin them out until there is roughly one plant every 12 inches (30 cm). Pinch the tips out to promote branching. Individual stakes work best for supporting zinnia plants. Use pea or jute netting to cover your young plants and support it between bamboo or hazel canes if you’re growing them in a vegetable or cutting garden for picking. The zinnias are barely supported and will climb up and through the grid. The netting will soon be covered in fresh leaves and foliage.
Staking them correctly is worth the work because they benefit immensely from early straight growth. They will never develop or bloom as effectively when supported vertically as they will if they collapse.
sowing zinnia seeds undercover
I use coir Jiffy pellets because zinnias detest root disturbance; this minimizes handling. In order for the seedlings to slip right out into their planting hole, you can also sow them into lengths of guttering.
When seeds are planted in modules or gutterpipes, there is no need to poke them out; the seedling can be put directly outside when it is still young and has only one or two genuine leaves. When it’s warm enough to sit outside at night, do this (usually June).
The seedlings should be planted in healthy, well-drained soil in a sunny location. As you plant them, pinch the tips to promote branching.
Stake each plant separately to promote healthy flowering and straight, tall growth.
growing zinnias in a pot
When the nights are warm in late May or early June, you can plant zinnia seedlings that you’ve purchased or grown yourself into containers (earlier if you keep the containers under glass for a few weeks). Before planting, wait until the seedlings have two or three sets of genuine leaves.
Choose your pot size wisely because different zinnia types require different sized containers. Put peat-free, freely draining compost inside. Plant no more than three seedlings in a pot with a diameter of 35 cm (1 foot), but this will actually depend on the variety you have, so read the instructions for each type.
4-6 weeks after planting, or around the time the fertiliser in the compost is depleted, water thoroughly and fertilize with a liquid fertilizer.