How to Start a Zinnia & Cosmos Cut Flower Garden in 5 Easy Steps - (2024)

How to Start a Zinnia & Cosmos Cut Flower Garden in 5 Easy Steps - (1)

This will be my third year growing a cut flower garden in our backyard! I am no gardening professional, so I fully believe you can successfully do exactly what I’m doing. A single planting of these flowers will produce about 3 months of blooming backyard flowers, which I use in arrangements for our home and give away to friends. This post is intended to be super simple and not overwhelming, so keep in mind there is SO much more to learn!

To help you get started, I’ve broken it down to 5 easy steps, and added some links to additional resources and products at the end of this post.

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It’s important to note that I’m located in Middle TN (Zone 7b), so planting information will vary by zone!

If you’re wanting to dig in more, I highly recommend the book Floret Farms Cut Flower Garden. It is worth the money. Not only is it full of information, but it also doubles as a beautiful coffee table book!

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1. Determine Where You Will Plant Your Cut Flower Garden

To make things simple, the flowers I recommend starting with are zinnias and cosmos, which are two of the easiest cut flowers to grow. These are both prolific bloomers that continually bloom from roughly July through September.

First, you need to determine a spot with full sun where you are going to plant your flowers in order to know how many seeds to order.

You only need a couple of feet to grow flowers. You’re supposed to plant these seeds roughly 9-12 inches apart from one another, but I normally squeeze them in tighter.

This year, I’m planting mine in our raised garden beds, and in our mulched landscaping beds around the house. The first year I planted seeds, I cleared out the grass from around our chicken coop, bought a bag of gardening soil to spread on top of the dirt, and planted them there. If you don’t have a preexisting landscaping bed, clear out grass & add some soil like I did to create an impromptu bed.

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2. Order Your Seeds

Now for the fun part! Figure out which varieties of zinnias & cosmos you want to order! I always order mine online. They are SO much better than the seed packets I grabbed at Kroger one year. Floret’s zinnia varieties are by far my favorite. Her seeds typically go for sale at the beginning of February and sell out quick. Johnny’s Seeds also has beautiful cosmos and zinnia varieties.

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3. Patiently Wait to Plant

Once you have your seeds, I direct plant them into the soil once it warms up. Both of these flowers resent cold weather, so you need to wait to plant them once it has warmed up. Patience is KEY! The rule of thumb that I follow for where I live (Middle TN) is to plant your seeds after Mother’s Day.

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4. Water & Watch Them Grow!

Once your seeds are planted, begin to water them daily. You should begin to be able to see them sprout in 3-5 days. (Confession: there are many days I forget to water and these flowers are very forgiving!)

Both of these flowers benefit from “pinching” which leads to more abundant flower production and longer stems. This means that when your plants are young and 8-12 inches tall, take sharp pruners and cut the top 3-4 inches off the plant, just above the first set of leaves. This makes the plant send up extra stems from where you cut. However, if this scares you as a beginner, no need to worry. I’ve had beautiful blooms the past 3 years without doing this.

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5. Cut the Flowers & Create Bouquets!

You should begin to see blooms within 3 months of planting the seeds. Once they start blooming, be sure to harvest & bring them into your home or give to others! They are called “Cut and Come Again” flowers, because the more you cut, the more will grow! Be sure to cut each bloom at a set of leaves, so a new shoot will start where you cut from. If you aren’t harvesting, be sure to cut off the dead blooms so they plant can use that energy to create new blooms.

When you’re creating bouquets, get creative with what you already have in your yard. Adding just a few extra clippings of different plants to your zinnias and cosmos really jazzes up a bouquet! It’s my goal to slowly add more perennials to our yard (plants that come back every year), so I have a plethora of flowers to choose from when creating bouquets. I currently have Annabelle Hydrangeas, a climbing rose bush, ferns, Daisies, a Butterfly Bush, mint, and more that I love to use! I may need to create a blog post on my favorite landscaping plants to use in arrangements. You can also purchase flowers at Kroger to fill in-I usually love their clearance flowers!

Like I said earlier, this just barely dips your toes in the water when it comes to flower gardening. There is SO much more to learn! I’ve included some of my favorite resources below, as well as some products you may need.

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Favorite Cut Flower Garden Resources

  1. Floret Farm’s Cut Flower Garden Book– I already mentioned this above. It’s my favorite learning tool for flowers.
  2. Floret Farm’s Blog Post on Zinnias
  3. Floret Farm’s Blog Post on Cosmos
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Favorite Cut Flower Garden Products

  1. My favorite hand pruners for clipping flowers
  2. Wide Mouth Plastic Watering Can (I love plastic so it won’t rust!)
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Other Product Ideas

  1. Labels for Marking Types of Seeds
  2. Gardening Tool Set
  3. Gardening Gloves
  4. Heritage Blue Stripe Stoneware Pitcher for Farmhouse Flower Arrangements
  5. Whimsical Garden Lights

If you have any additional questions once you’re done reading, feel free to reach out to me on Instagram or Facebook, or in the comments below. I’m sure you aren’t the only one with the question you have, and I’d love to answer to the best of my ability. Happy gardening!

Daisy Sue

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How to Start a Zinnia & Cosmos Cut Flower Garden in 5 Easy Steps - (2024)

FAQs

How to Start a Zinnia & Cosmos Cut Flower Garden in 5 Easy Steps -? ›

Cosmos and zinnia

In this all-pink combination, the daisy-like flowers of pale pink cosmos are enhanced by magenta zinnias. Discover eight essential border daisies to grow.

Can I plant cosmos and zinnias together? ›

Cosmos and zinnia

In this all-pink combination, the daisy-like flowers of pale pink cosmos are enhanced by magenta zinnias. Discover eight essential border daisies to grow.

How do you plant zinnias for cut flowers? ›

For cut flower use, Zinnias can be grown anywhere from 6-12” apart. Closer spacing encourages longer, straighter stems… but too close and you risk increased disease problems.

How to grow a flower garden for beginners? ›

How to Start a Flower Garden
  1. Check your hardiness zone. ...
  2. Choose the location. ...
  3. Check your garden soil. ...
  4. Choose your flowers. ...
  5. Practice companion planting. ...
  6. Know your watering schedule. ...
  7. Set up protections. ...
  8. Research plant care.
Jun 7, 2021

When to plant zinnia and cosmos seeds? ›

Planting: Plant zinnias in spring after all danger of frost has passed, around the same time you'd plant tomatoes.

How many cosmos should you plant together? ›

Cosmos should be planted 9-12 inches apart, and ideally supported with horizontal netting. If you don't plan to use netting, space them a bit closer so they help support one another (although tighter spacing can hasten the spread of disease).

How many cosmos to plant together? ›

Sow and Plant

Plant seeds in prepared soil about 2 inches (5 cm) apart and one-half inch (1 cm) deep. Thin to 8 inches (20 cm) apart in all directions for dwarf varieties; allow 12 inches (30 cm) between very tall varieties.

How far apart to plant zinnias for cut flowers? ›

Spacing: Narrow spacing is better for flowering, as it reduces side branching, but is best for single harvest; wide spacing at 2' between rows and 6” within the row is better for multiple harvests. In bed culture 6" between plants was satisfactory for summer production in Florida.

How many zinnia stems per plant? ›

Zinnias do not need refrigeration. Avg. 20–30 stems per plant, though this can vary depending on how long you cut your stems. MARKETING: Zinnias can be bunched and sold separately by color or variety or they can be used in mixed bouquets.

How long does it take for zinnia cuttings to root? ›

Zinnias can also be propagated via cuttings as well in about 3-4 weeks if desired.

What is the 3 hour rule for gardening? ›

The concept is simple: don't go out in the sun to tend to your plants during its strongest rays, which generally occurs between 11 AM and 2 PM.

How to start a flower garden step by step? ›

How to Make a Flower Garden
  1. Step One: Choose a Location. The first step is deciding where you would like to plant your flower bed. ...
  2. Step Two: Choose your Flowers. ...
  3. Step Three: Remove the Grass. ...
  4. Step Four: Prepare the Soil. ...
  5. Step Five: Plant the Flowers.

What month should you plant zinnias? ›

Plant zinnias in late spring, after the last frost has passed and the soil is warm. Start seeds indoors in individual containers, set out purchased plants, or direct-sow into warm soil.

Can I just scatter zinnia seeds? ›

Even the planting process is easy. I put down fresh mulch, then sprinkle the Zinnia seeds where I want them. I don't worry about spacing or anything, I just scatter them.

Should I soak zinnia seeds before planting? ›

Zinnia seeds do not require any treatment (eg soaking, stratification) before sowing. Zinnia seeds can be sown directly into the garden OR seedlings can be raised in trays or other containers and transplanted to the garden once established.

What flowers grow well with cosmos? ›

Cosmos: Favorite Companion Plants and Garden Design Advice

Plant alongside zinnia, pansies or Johnny Jump –ups for a burst of bright color in the front of a border or rock garden. The Sonata series is bred to be shorter and sturdier, and is therefore ideal for pots or smaller gardens, and is especially decorative.

What flowers grow well with zinnias? ›

More Flower Companions for Zinnias - marigolds repel nematodes, cosmos attract beneficial insects, and nasturtium's blooms visually complement zinnia flowers.

What plants look good with cosmos? ›

Anchor the cutting garden with multiple varieties of cosmos. You may also want to include other annuals like zinnias, sunflowers, larkspur, bells of Ireland, and bachelor's buttons. Because cosmos flowers are so easy to grow, they make a fun choice for a children's garden.

Do zinnias like to be crowded? ›

For healthy growth and plenty of air flow to the stems, thin plants to be about 6″ apart and space rows 10-12″ apart. If zinnias are too crowded, they will still grow but the blooms will be much smaller.

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