Lights and seed starting mix will be the two most crucial supplies. Although it may seem simpler to set a small pot of garden earth near the window, doing so will only produce flimsy seedlings that will struggle all the way to the garden.
Your zinnia seeds will grow considerably better with just one shop light from the hardware store and one bag of seed starting mix (or create your own for cheap!).
Get your seed starting supplies ready
- You should put seed-starting mix in your containers. A seed tray, tiny paper cups, peat pots, or even used yogurt containers are suitable. Make sure the container has adequate drainage holes so that extra water can be drained out.
- Compost, perlite, and vermiculite—a light, fluffy material that retains moisture well—should be included in the seed starting mixture. There are bags of pre-made seed starting mix available at any hardware shop or garden center, or you may make your own for less money. An excellent post by Garden Betty demonstrates how to build your own mix using a simple technique.
- Make sure the mixture is moistened beforehand, or add little water. The ground should be moist but not flooded. A small amount of the mixture ought to roll into a ball and barely hold together.
- Fill the cups, trays, or other containers you’re using with seeds. Soil should be gently pressed into the container.
Sow the zinnia seeds
- Take out your zinnia seed packet, and plant one seed in each soil-filled tray cell. Place a seed every 2 inches on the soil surface if your container isn’t divided.
- It is sufficient to cover zinnia seeds with only 1/4 inch of soil.
- To help the seeds and soil take root, lightly mist the soil or moisten with a stream of water.
- The seeds must be constantly watered until they sprout. Keep in mind that if the seeds begin to sprout but then dry up, the sprout will die and you will need to replant.
Set up the seed trays under lights
- The shop lights should be positioned so that the light is two inches above the soil as you place the seed trays beneath them. The ambient light in the room serves as adequate illumination at this time, so there is no need to turn on the lights.
- Warm the soil by using a heat mat, if possible. Warm soil will hasten the germination of zinnias, a warm-season flower. The seeds may not even sprout if the soil is too cold.
- If the soil is 70 to 75 degrees, zinnia seeds typically germinate in a week. If the seeds are in a cooler place, keep in mind that lower temperatures imply it will take longer for the seeds to sprout.
- After the seeds have sprouted, they will require 16 hours each day of direct sunshine. Setting your lights to come on from 6 am to 10 pm is the simplest way to accomplish this.
For the next four to six weeks, you must take care of your seeds daily until they are prepared for transplantation into the garden.
Keep the soil moist during that period until the seeds sprout. As the plants swell in height, raise the lights accordingly. To maintain a bright light while still allowing the plants room to grow, the lights should be placed about two inches above the plants.
When the threat of frost has passed and the zinnia seedlings are 3–4 inches tall, you can move them outside.
Here are some of my preferred techniques for facilitating the transplantation of my seedlings: Seven strategies for reducing transplant shock in seedlings.
Check out this James Prigioni video for a thorough explanation of the transplantation procedure:
Before planting, should I soak the seeds for zinnias?
If you’re raising zinnias from seed for the first time this year, you might still have some concerns. Here, I’ll address them for you.
How do you germinate zinnia seeds fast?
To hasten the germination of zinnia seeds, keep the seed trays warm. The biggest effect will be made by heated mats and a warm environment. Zinnia seeds can germinate in as little as five days when the soil is 70 to 75 degrees Fahrenheit, the ideal temperature for germination.
Should I soak zinnia seeds before planting?
Before sowing, zinnia seeds don’t require soaking. The seeds of zinnias are designed to sprout quickly when exposed to water since they are warm-season annual flowers that are indigenous to hot climates like Mexico and the southwest of the United States. The seeds only need to be sown and watered for germination to begin.
How long do zinnia seeds take to germinate?
The normal germination time for zinnias is 5 to 10 days. Seeds sown in trays with the soil kept warm at 70 to 75 degrees Fahrenheit using heat mats will germinate more quickly than seeds sown in cold soil, which could take up to three weeks.
Do zinnia seeds need light to germinate?
Zinnia seeds should be placed with 1/4 inch of dirt on top of them because they don’t require light to germinate. The seeds will require intense light in the form of a shop light or grow light as they begin to germinate and break the soil’s surface.
At what temperature do zinnias germinate?
Zinnia seeds should be germinated at 70 to 75 degrees Fahrenheit. The soil will reach these temperatures with the help of a heat mat put beneath the seed trays. In soil that is colder than 70 degrees, the seeds will still germinate, but it will take longer.
Do zinnia seeds need cold stratification?
Cold stratification, which involves chilling seeds prior to sowing, is not necessary for zinnias. The seeds of zinnias are designed to germinate without being exposed to cold because they are warm-season annuals that are native to hot climates.
How long does it take for Zinnia seeds 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.
Does darkness help zinnia seeds sprout?
Beautiful flowers like zinnias are ideal for novice gardeners! These annual flowers come in a wide range of hues and variations, adding a vibrant pop of color to your yard and making them ideal for bouquet-making. Zinnias require only plenty of sun, warmth, and well-drained soil to thrive and can be grown without much care from summer until the first hard frost in the fall. They don’t have any significant pest issues and can draw lovely butterflies to your garden.
Depending on your location, the growing strategy may change slightly. When the temperature starts to rise, zinnia seeds can be sown immediately into the garden in warmer climates. Here in New England, it takes longer for the temperature to rise, so if you can keep the soil between 70 and 80 degrees F, you can start the growing process about a month before the final frost is predicted. Since zinnias dislike being transferred, sow seeds in peat pots that can be placed straight in the garden. From seed to flower, zinnias normally require two months, though this might vary depending on the weather.
Here are some more hints for growing zinnias:
- For your zinnias, choose an area that is sunny and bright.
- Zinnia seeds require sunshine to sprout, so only cover them with 1/4 inch of dirt.
- Keep the soil damp while the flowers grow.
- Thin seedlings to 6-8 inches apart for small varieties and 1 foot apart for large varieties when they are 2-3 inches tall.
- Avoid drowning the zinnias in water. Water intake of 1 inch per week is advised.
- To encourage the zinnias to generate more blooms, remove any faded or dead flower flowers. Deadheading is the term for this.
How long do Zinnia seeds need to soak before planting?
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One of those flowers that just puts a smile on my face is the zinnia. Zinnias hold a special place in my heart when it comes to my gardens, whether they are among my vegetables as a companion plant to attract helpful pollinators (bees, wasps, butterfly, and ladybugs), or in a vase on my countertop.
As a native of Mexico and a member of the aster family, zinnias are a constant source of color in my garden during the entire growing season since they consistently put on a stunning display from midsummer until frost.
It’s interesting to note that the Aztecs described zinnias as “plants that are harsh on the eyes,” probably in reference to some of their bright colors.
TYPES OF ZINNIA
Zinnia, of which Zinnia elegans is the most common species, is a well-liked annual with flowers that can have single, double, or semi-double flowerheads. Which category it belongs to depends on the flower’s growth pattern (the number of rows of petals and if the center is visible).
Consider the shape of your zinnias when selecting a variety. The flowers now come in cactus, button, and beehive shapes. There are currently many distinct types with varied heights, so it is important to take care while selecting the right height.
With the hundreds of cultivars and hybrids currently available, there is literally something to fit everyone’s preferences! You may plan the layout of your garden with ease by selecting the appropriate growth habit, shape, and height.
Zinnia seeds are a fantastic option for both kids and novice gardeners because they are huge (making them a good choice for seed savers), germinate quickly, and are really simple to grow!
So tell me, which variety of zinnia is your favorite. The ones shown below, in my opinion, are. They have a blush tint, which is less vibrant than other zinnia.
The zinnia seeds in question are from the “Queen line of zinnias,” which I obtained from Johnny’s Selected Seeds; the variety in question is “Queen Lime Red.” Johnny’s description of the blossom is superior to mine.
These flowers’ antique hue, which also comes in red, orange, and lime, makes for the most gorgeous cut bouquets!
When adding zinnia to your garden beds, you can never go wrong with your choice of color or style.
GROWING ZINNIA BEAUTIFULLY
I must admit that over the years, I’ve grown some really picky plants, but zinnias are not one of them.
Zinnias are well renowned for being pest-resistant and adaptable to a variety of soil types. They do prefer a soil pH of 5.5 to 7.5. All they really need to put on a show is water and sun.
ZINNIAS WATERING REQUIREMENTS
In terms of water requirements, zinnias are typical of most flowers. Consider watering your garden by a total of around an inch every week. This instructs you to water no more than one inch, whether Mother Nature waters or you do.
Powdery mildew is a fungus that can grow on zinnia if it receives too much water. Due to the risk, you should refrain from watering the flower’s actual foliage and petals. Instead, water the plant solely from the base, avoiding watering in the midday sun.
I strongly advise using a soaker hose or drip irrigation for all of your garden watering requirements. These irrigation systems, in my opinion, are a far more environmentally friendly way to water our plants because they not only use less water but also lessen the danger of illness and save me a ton of time.
ZINNIAS SUNLIGHT REQUIREMENTS
Sunlight is the main necessity for zinnias to flourish profusely. For the best outcomes, they demand full sun conditions, which means they need at least 6 hours every day of direct full sun exposure.
Despite the fact that they can withstand some shade, especially in warmer regions, there is a higher chance of disease development.
If you choose a spot for your zinnias that has sufficient air circulation, whether you direct seed them or transplant them, you can lower the likelihood that they will eventually acquire powdery mildew.
ZINNIAS SPACING REQUIREMENTS
Plant zinnias in rows or beds that are at least 2 inches apart when direct-seeding them in the garden. Plan to thin later after the plant has grown its “real leaves,” which should be at least 8 to 18 inches apart (four leaves total on the plant).
These are only general recommendations, and your success will depend on the variety you have chosen to plant.
ZINNIAS PLANTING REQUIREMENTS
Use the above advice or the instructions on your seed packet to sow seeds straight into the garden in the spring once the risk of frost has passed.
This usually occurs around the time when you plant your tomato plants in the ground.
Plan on transplanting hardened off (acclimatized to the outdoor environment) zinnia as soon as the risk of frost has passed as well for those impatient to see those lovely zinnia blossoms a little bit sooner who have grown their zinnia indoors.
HOW LONG DOES IT TAKE TO GROW ZINNIA FROM SEED
The time it takes for zinnias to blossom will be between 60 and 70 days after you plant the seed. Once more, this is only an approximate estimate because the length of time depends on the variety you select.
DO ZINNIA SEEDS NEED TO BE SOAKED BEFORE PLANTING
I think it’s up to you. I don’t soak my seeds before planting, and I haven’t noticed any differences in germination periods or rates.
If you decide to soak the zinnia seeds, aim to soak them for no longer than 4-6 hours before planting.
HOW TO GROW ZINNIA FROM SEED
Buying annuals, including zinnias, can be pricey. especially considering how many zinnias I like to grow
Consequently, starting zinnia plants from seed will save you a ton of money! When learning how to produce zinnias from seed, you have two choices, as I’ve already mentioned. Start indoors or with direct seed.
It should be noted that many say zinnia are a bit finicky when it comes to transplanting your started zinnia as they don’t like their roots disturbed. That hasn’t been my experience, and if you know me at all, you know that I’m a right or die gardener. Not the gentlest when it comes to how I handle plants.
I’m also not the most patient person. I start my zinnia plants indoors as a result, and I am very successful at it.
TIPS FOR STARTING ZINNIA INDOORS
Start your seeds in biodegradable jars that may be planted immediately in the garden if you are worried about the transplanting procedure and upsetting the zinnias’ root structure. Peat pots, dung pots, and similar items would be ideal.
Plan to sow indoors at least 4-6 weeks before the intended transplant date. Sow the seeds in a container using seed starter mix that has been soaked, and then lightly top with soil mixture.
Keep the ground warm and moist. To maintain a consistent soil temperature of between 70 and 75 degrees Fahrenheit, I use a heat mat. It normally takes seedlings 7 to 10 days to emerge. Whenever they do, make sure they have a lot of light, whether it’s on a windowsill or grow fluorescent plant lights that are on for roughly 16 hours every day.
Thin the seedlings to one plant per cell once they have grown two sets of leaves.
Visit my website and look at my post, Seed Beginning 101, for a thorough and in-depth explanation on seed starting.
TIPS FORDIRECT SEEDING ZINNIA INTO THE GARDEN
Zinnia can be directly seeded into the garden, beds, or containers once all threat of frost has passed.
In order to do this, put the zinnia seed straight into the ground in well-prepared garden soil, about 1/4 inch deep, in accordance with the spacing guidelines given above or on your seed packet.
TIPS FOR TRANSPLANTING PURCHASED ZINNIA PLANTS
If all else fails and you buy your plants from a nursery or gardening store and they have bloomed, it is advisable to trim them back by 1/3 to assist reduce any shock or upheaval.
Why? By promoting bushing, it will stimulate new development at the root system and produce a more attractively complete plant.
a transplant
- At least twice the size of the root ball should be dug out.
- Put the plant in the hole so that the root ball is parallel to the soil’s surface.
- Backfill the soil and carefully push it down.
- Water well so that the earth can settle, the roots can link properly to the soil, and any air pockets can be released.
HOW TO CARE FOR ZINNIA
Like the majority of plants, zinnia struggles when weeds start to overtake the area. Maintain a weed-free zinnia bed for happy plants.
Mulching will be of great assistance in this area. Mulch also helps to keep soil temperatures constant and to retain soil moisture levels. When using mulch, it’s best to keep the plant stems a little bit away from it. Ideally, give them a chance to breathe. Stem rot will be less likely as a result.
Maintain watering as necessary (about 1 inch total per week). When the weather is the dry, keep a tight eye on your plants. If you need assistance with monitoring, I suggest utilizing a rain gauge.
It’s time to add some fertilizer after your plants have established themselves and you start to see new growth. Use of liquid kelp, seaweed, or organic 5-5-5 fertilizer is strongly advised.
Pinch back young plants to stimulate branching to create bushier growth. Unless you want long stems for cutting or need height in your garden bed, that is.
To encourage new growth and guarantee that you will have continual blooms throughout the season, constant deadheading is required.
Allow the last flowers of the season to fully mature, cut, dry, and keep the seeds if you wish to do so.
You must be aware of whether your zinnias are hybrids or open-pollinated. Rarely will a hybrid remain true to its parent plant. Cross-pollination between zinnias is relatively simple. If you want to avoid cross-pollination, you should bag or cage a number of flower buds before they blossom, unless you have the capacity to plant those you want to save true seed very, very far away, like one plant type every half-mile (who has that kind of space?).
DEADHEADING ZINNIA TIPS
So where do you deadhead for the best outcomes? When it comes to snipping those plants, there are only a few things to take into account. Everything relies on your ultimate objective.
- In terms of height, it matters where you cut your plant. A plant will grow lower overall if you cut it low on it; if you cut it further up the stem, the opposite will happen.
- BRANCHING
- Anywhere along the stem that is severed, the plant will branch where the cut was made.
- Zinnia is a highly understanding plant. LEAF REMOVAL Typically, removing any undesirable leaves has no negative effects on the plant.
ZINNIAS PEST & DISEASE ISSUES
There aren’t many pests and illnesses that can harm zinnia. Particularly when attention has been paid to correct soil preparation, solar exposures, fertilizing, mulching, and air circulation factors.
Aphids, spider mites, and whiteflies can occasionally harm zinnia during hotter weather. I simply spray them with a powerful stream of water if this occurs.
Once more, very few disease difficulties will arise when the growing requirements for zinnia have been properly met, notably the watering requirements.
Powdery mildew has already been mentioned. Issues with leaf spots caused by Alternaria, Cercospora, and Xanthomonas are also important factors. If any of these problems occur, you can treat them using fungicides if you so choose.
You have it now! Zinnias are very easy to grow from seed, are inexpensive, and add color to any flowering garden area.