When to Plant Bulbs in Greenhouse?

When to Plant Bulbs in Greenhouse?- Spring is the best time to start the Flower bulbs in the garden. Early preparation can give you a headstart with beautiful early blooms in the season. Although if you have a Greenhouse (Lucky You), You can grow bulbs any time of the year in a greenhouse. You have to take care of one thing- the seasonality of the Bulb. If you choose a bulb according to its growing season, then you will get the optimum bloom within 6 to 8 weeks. All you need to do is prepare your indoor greenhouse garden. Select the best flower bulbs for the upcoming season. Finally, mix some soil with compost and grow the bulbs in it. It’s quite a simple process to accomplish especially if you know the basics.

Check out my previous post: Spring Yard Clean up List: Garden Preparation

Can I plant bulbs in a greenhouse?

Yes, definitely you can grow bulbs in a greenhouse. In fact, you can try any flower blub to grow inside a greenhouse throughout the year. It is possible that you won’t get enough flowers in every bulb especially in those grown untimely out of their growing season. Still, the plant will develop good foliage with a strong root system.

This growth will give the plant ability to bloom faster and better in time. Therefore, you can plant bulbs in a greenhouse. Most importantly you should grow bulbs in the greenhouse before the growing season to get the advantage of pre-season growth. This is the commercial way to get blooms from flowering bulbs throughout the year.

When to Plant Bulbs in a Greenhouse?

If you are still reading then I’m sure you also love flower bulbs just as I do. Being a gardener it is our passion and duty to make the surrounding beautiful with natural colors. The best way for us is to grow flowers. Finally, the easiest of the flowers to grow comes from bulbs. They demand less and always blooms in time. You can really predict a Lilly or Dahlia bloom time better than any perennial like Hibiscus or Rose. They don’t require much space and resources. More Importantly, these bulbs are easy to grow, transplant, and shift from one spot to another without serious damage.

The best of all is when the bulbs serve their duty by blooming. You can simply ease out the space occupied once they are done. Most bulbs don’t need to stay in the soil in their dormant state. Therefore you can dig them out, dry those bulbs, put some fungicide, and store them in a cool, well-aerated shed rack. You will instantly get the garden space free for the next growth. Isn’t it cool, you don’t have to care for the plant once it’s done with blooming.

Moreover, growing bulbs especially indoors in a greenhouse is pretty easy. You won’t require much knowledge and heavy tools to complete this task.

white amaryllis summer flowers

You can plant flowers and other bulbs in a Greenhouse in all four seasons.

  • Spring (Later January to Early March)
  • Summer (Mid-March to July and early August)
  • Autumn (August till October)
  • Fall or Winter (Mid-October through January)

Just make sure you choose the right bulb to grow in the right season. Otherwise, the plant will grow without many flower spikes. Also, some bulbs bloom in their second year of growth. You can grow them inside your greenhouse and wait for the right time and temperature to transplant them outside in the garden.

What Bulbs to Plant in Greenhouse?

You have decided on the flower bulb according to its growing season. You can indeed grow any plant all around the year inside a greenhouse. Temperature, moisture, and humidity can also be controlled. Still, the plant will tend to follow its biological cycle. The expected bloom can fail in unfavorable conditions if grown in the opposite season. Therefore it is always better to choose flower bulbs for the upcoming season to grow in a greenhouse.

It will be easy to handle such plants. In fact, you can move them out when the temperature becomes favorable for blooming.

Snapdragon summer white flowers

You should also read this: 60 Beautiful White Flowers to grow this Summer

Below is the list of Flowering bulbs to grow in Different Seasons.

Bulbs to plant in a Greenhouse in Spring

  • Crocosmia
  • Peacock Orchid (Acidanthera)
  • Iris
  • Tulips
  • Freesia
  • Daffodils
  • Triplet Lillies
  • Anemone
  • Tuberose
  • Look out for these beautiful Spring flower bulbs on Amazon.

Summer bulbs to grow in a greenhouse

  • Most Tropical bulbs
  • Dahlia
  • Elephant Ears (Alocasia)
  • Canna lilies
  • Pineapple lily (Eucomis)
  • Gladiolus
  • Tuberose
  • Check out my Favourite Summer Flower Bulbs on Amazon.

Autumn Flower Bulbs for greenhouse garden

  • Elephant Ear
  • Dahlia
  • Windflowers (Anemone)
  • Cyclamen (Cyclamen Prsicum)
  • Gloxinia (Sinningia)
  • Dutch Iris

pink lily

Also read: How to Grow Canby Raspberries?

Bulbs to Plant in a greenhouse in Winter

  • Dutch Iris(Iris x. Hollandica)
  • Peacock Orchid
  • Windflowers
  • Iris
  • Amaryllis
  • Paperwhites (Narcissus Tazetta)
  • Triplet Lillies
  • Persian buttercups (Ranunculus)
  • Calla lillies(Zantedeschia)
  • Freesia
  • Crocosmia
  • Daffodils
  • Tulips
  • Hyacinth (Hyacinthus)
  • All Lilliums
  • Check out my favorite Fall Winter Flower Bulbs only on Amazon.

This list is not complete and it can never be complete. There are 100s or even 1000s of flowering bulbs available to grow worldwide. No one knows all of them. So if you think I missed something important then let me know in the comment. I will definitely respond and update the list As Soon As Possible.

Meanwhile, give these flowering bulbs a try and share your experience with us.

iris beautiful flower

Check out this: Plants and Vegetables to Grow in January

Can I Plant Bulbs in Greenhouse in Winter?

Sure, you can plant bulbs in a greenhouse in winter. In fact, most of the spring bulbs are grown indoor in winter to get an early bloom.

The warm and controlled environment of the greenhouse will keep the bulbs safe from frost and any pest attack. If you manage to keep the plant healthy and continue growing then the best bloom in spring will be your reward.

You can easily grow Iris, Daffodils, Crocosmia, Freesia, Ranunculus, and many more flowering bulbs in the winter. They do well inside a greenhouse.

Plant the bulbs at least 6 to 8 weeks before the actual season i.e., spring. Care for the bulbs, observe the growth and feed them whenever required. You should use any Potassium and Phosphorus rich fertilizer during bloom season. NPK 0:10:10 or similar fertilizer can do miracles for your flowering bulbs. Use it only when the plants become mature to avoid premature blooming.

Winter can be hard for the bulbs even inside the greenhouse. It doesn’t feel much but winter can also dehydrate the bulbs. So never forget to moisten the roots to continue healthy growth.

One Important tip: Never plant all the bulbs together. Instead, Plant a few of them in groups with definite Intervals. This will allows continues blooming throughout the growing season.


Hi, My name is Sukant. I am an I.T professional. Gardening for me is not just a hobby, it's a way of living life with nature. My Ancestors were Commercial farmers: So I personally feel attached to the green. I am not an expert, I'm here only to share my gardening experiences. It's always Refreshing.

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