| |

What Supplies You’ll Need to Start a Cut Flower Garden By Seed

Are you considering growing your flowers and vegetables by seed this year? If you are, I’ve compiled a list of what supplies are needed to start sowing your seeds to grow strong and healthy plants.

I plant most of my seeds in the greenhouse rather than planting them directly in the garden. This is mainly because the weather can be so unpredictable this time of year in the Pacific Northwest, and seeds are so delicate and can be damaged very easily.

interior greenhouse with seed starting supplies

When growing a cut flower garden from your own seeds, it all starts with how you sow your seeds.

It’s important to have the right supplies to start sowing your seeds and just the right environment to grow healthy seedlings.

As an Amazon affiliate, I earn from qualifying purchases at no extra cost to you. My blog contains other affiliate links as well for your convenience. Click here to read my full disclosure policy.

I’m a self-taught hobby gardener, not a Master Gardener. Everything I share with you on my blog is my personal opinion and things that have worked for me personally.

Seed starts in containers

seed starting supplies: seed packets

Quality Seeds

Using quality seeds is essential for growing a successful cut flower garden. They are more likely to produce strong, healthy plants that are more resistant to disease and pests and are better equipped to withstand harsh weather conditions.

Investing in quality seeds means your flowers will provide the following:

  • more consistent results
  • higher quality and more vibrant colored flower production
  • healthier and more vigorous longer-lasting blooms
early stages of the cut flower garden

I buy over 90% of my flower seeds from Floret Flower Farm. To see the cut flower seeds I chose to grow for the last three years, click the buttons below.

insole the greenhouse with seed starting supplies

Seed Starting Mix

Using just any garden soil is one of the mistakes beginning gardeners make when starting their cut flower garden from seed.

Start your seeds with a high-quality seed-starting soil mix that contains nutrients and the proper pH balance.

Look for soil free of toxic substances, and avoid anything containing a synthetic fertilizer or bark, which can burn young plants. Find a seed-starting potting mix that holds moisture properly.

seed starts growing in container with plastic dome and heat lamp


Choose the Right Container to Start Your Seeds

One of the most important seed-starting supplies is the container that holds the seeds. There are many options for choosing the right container for your seeds. You can start them in anything 2-3 inches deep that holds soil and has drainage holes.

There are so many different sizes and shapes for containers to grow seedlings. Choose from a variety of seed-starting containers:

It’s crucial to have holes in the bottom of the container for a plant’s healthy root system, which needs space to grow so any water can drain. Otherwise, the water will sit in the container, and the plant will rot.

seed starting supplies: cell trays filled with seed starting mix

I get the best results with cell trays for most of my seeds. The 72-cell flats are my favorite because I never have to re-pot seedlings before it’s time to transplant them in the garden.

When planting sweet peas, pumpkins, or vines, I use larger containers, usually 4-inch pots. Root trainers are great for sweet peas, but I have seen a rolled-up newspaper tube work just as well. With so many choices out there, spending a lot of money on containers is unnecessary.

cleaning containers with water and bleach

Clean Used Containers

If you decide to reuse pots or containers, wash them with a one-part bleach / nine-parts water solution to kill any diseases or pathogens.

seed starting supplies: drainage tray

Drainage Trays

You will need a drainage or seedling tray to set the plant containers in.

Filling these trays with water when the seeds are first planted allows the plants to soak up water through the bottom holes in the containers. This watering method helps prevent overwatering and keeps the seeds from washing away if watering overhead.

seed starting supplies: plastic dome cover

Humidity Domes

A humidity dome lid provides a warm and moist environment which encourages germination. I recommend using clear acrylic lids that will fit snugly over the seed trays and flats or pots.

seed starting supplies: Seed starts in 4-inch container with heated mat

Heat Mat

Using bottom heat will keep your seeds warm and moist for rapid germination.

A heat mat is a great tool when growing seeds in a greenhouse. If you don’t have a greenhouse, the top of a radiator or refrigerator will also provide the same results.

sweet pea seedling

Grow Lights

New seedlings need adequate light to grow healthy and strong, with around 14-16 hours of light. Otherwise, plants tend to become weak and spindly without enough light,

Heat lamps are recommended when growing seedlings, especially when growing plants in your home or basement. They provide light and heat to encourage healthy, strong plants and help speed up growth.

I have never used a grow light in my greenhouse and rely on natural light from the skylights and windows in my outdoor structure, and my flowers have always thrived in my cut flower garden. But I have bought several this year and look forward to seeing the difference in growth.

seed starting supplies: seed supplies

Seed Starter Kits

Seed starting kits are available if you are growing a limited amount of seeds.

If you buy the seed cell tray, drainage tray, and humidity dome, and grow light separately, you will most likely get a better deal if you sow several varieties of seeds like me.

But buying 3 or 4 components together as a seed starter kit can be the best way for convenience and cost-efficiency if you’re buying just a couple of kits.

planting seedlings in the garden

Here are a few of them to choose from:

Seed Starter Kits Available

seed starting supplies: labels or plant tags

Plant Tags or Labels

Label your seedling containers as soon as you sow your seeds. Write the name of the seed variety and the date you sowed the seeds on the plant tag.

This is one of the seed-starting supplies that often get overlooked, but labeling plants is so important when growing seedlings and transplanting them outdoors.

inside greenhouse heater

Temperature-Controlled Heater and Fan


A temperature-controlled heater in the greenhouse is important when planting seeds because it helps ensure that the temperature and humidity levels are optimal for them to germinate and grow.

Temperature and humidity fluctuations can delay or prevent seed germination, so having a heater that can maintain a consistent temperature is essential for successful seed planting.

I keep our greenhouse at a minimum of 45°F. throughout the winter to grow seedlings and overwinter my geraniums.

thermostat and thermometer


Having a temperature-controlled fan in the greenhouse when planting seeds is important because it helps to create a consistent and optimal environment for the seeds to germinate and grow.

CLICK HERE for the thermostat link.

The fan helps to regulate the temperature and keep the air circulating, providing a more even and consistent temperature throughout the day and night.

A fan also helps to reduce the risk of diseases, such as fungal diseases, from developing on the seedlings by reducing humidity and increasing air circulation.

watering can watering soil

Watering Can or Hose

Water your seedlings in the greenhouse using a watering can or a hose regularly.

Until your seeds germinate and sprout, continue bottom watering, so you are not washing the tiny seeds away.

seedlings growing in the raised beds

The right seed-starting supplies are essential for growing a cut flower garden in the greenhouse.

With the proper supplies and patience, you can create a beautiful, productive cut flower garden that will provide you with a continuous source of fresh flowers.

I’d love to hear from you. Be sure to leave a comment below.

Until next time,

Happy Gardening!

Shop for Seed Starting Supplies


If you’ve enjoyed this blog post, please pin and share this on Pinterest.

Be sure to follow me @shiplapandshells on the following…

Pinterest | Instagram | Facebook | LTK | TikTok | Amazon Storefront

Facebook Gardening Tips & Tricks

Similar Posts


  1. Beautiful blog Kim! I can’t wait to read more. ? I love growing plants from seed but it’s been a long long time. Now I know where to come when I’m ready to do some more! Your photos are so inspiring – thanks for all of it!

    1. Thank you so much Barbara! I am so thrilled that you came here to check things out! My plan is to post a gardening post at least once a week. I hope you like them!

    1. Thank you for the compliment Stacy! It’s so much fun, I hope you get to join in on the fun soon! Thank you for visiting my blog!

Leave a Reply

Your email address will not be published. Required fields are marked *