How to Grow Dichelostemma?
Posted by Ben Rotteveel on

How to Grow Dichelostemma?

 

DICHELOSTEMMA PLANTING GUIDE

These hardy and easy to grow flowers don’t actually grow from bulbs but from corms; sweet-potato like tubers. They’re also called firecracker flowers, because they resemble a beautiful firework of pink and burgundy bursting into the sky. Standing out among the more classic flower bulbs, this is a bloom that won’t be overlooked.


QUICK GUIDE

  • WHEN

Plant in fall

Bloom in late spring/mid-summer


  • WHERE

Hardiness zone 5-8

Full sun 

Well-draining soil


  • WATER

Once after planting

Moderately in spring


  • WIDTH & DEPTH

4-6” apart

3” deep


Arrival

When your DutchGrown Dichelostemma corms arrive and you can’t plant them immediately, it’s important to store them correctly: unpack them right away and put them in a dry place with plenty of air circulation, where the temperature is between 40 and 70 degrees Fahrenheit.

How to Grow Dichelostemma Firecracker Flower


Garden & Container Planting

Like all flower bulbs, Dichelostemmas need a cold period to develop their roots and get ready for spring. So once you feel fall’s first chill in the air, it’s time to get planting. If you live in hardiness zone 9 or higher, the soil won’t get cold enough for the root-developing process to happen, but you might consider forcing 

Flower bulbs and corms are tough cookies that are easy to grow, but one thing they hate is getting their feet wet: a bulb or corm that is ‘bathing’ in water will rot in no time. So avoid soggy soil at all cost – this means places where you can still see puddles 5-6 hours after a rainstorm. Another thing you can do is to upgrade potentially soggy soil by adding organic material such as peat, bark or manure. When it comes to planting corms in containers, the mantra is exactly the same: drainage-drainage-drainage. Get a pot or box with at least some drainage holes at the bottom. 

Dichelostemmas need the sun to grow so make sure you plant them in a place that receives maximum sun hours.

Dichelostemmas will need to be planted deep enough that they won’t be affected by temperature variations above ground, either too warm or too cold. Unfortunately containers can’t protect bulbs as well as mother earth can, so when you live in hardiness zones 3-7 it might be better to let your containers spend the winter indoors, in a cool, dark, well-aired spot that won’t get warmer than 60 degrees Fahrenheit, like an unheated basement or garage.

The standard method for calculating the ideal depth is to dig a hole three times as deep as the bulb is high, and place the bulb at the bottom with its pointy end up. Since Dichelostemmas grow less well when they have to fight for nutrients with their fellow corms, it’s best to plant them 4-6” apart.

To help the bulbs and corms settle and grow roots quickly, it’s important to water them well after planting, but after that you won’t have to water them again. Now all you have to do is wait patiently for winter to do its magic underground, and spring to surprise you with the rewards of your work. 

During blooming season, you generally don’t have to water your Dichelostemmas, but you can water them when there hasn’t been any rain for 3-5 days. 

After Dichelostemmas have finished blooming, don’t cut the foliage straight away: through photosynthesis the leaves will create nutrients that the bulb will be needing for its next growing season. After a few weeks the foliage will automatically yellow and die back, and then you can remove it. Now the bulb will be going dormant, and won’t need any watering until next spring. 


How to plant Dichelostemmas in your garden:

  1. Wait until the soil is 60 degrees Fahrenheit or colder. In the North this will be in September or October, in the South in October or November.
  2. Pick a spot in your garden that has well-draining soil and gets full sun.
  3. Plant the Dichelostemma corms about 3” deep and 4-6” apart.
  4. Water well once and wait for spring
  5. After the Dichelostemmas have bloomed don’t cut off the foliage. Leave it until it’s completely withered and yellow, then remove.


How to plant Dichelostemmas in containers:

  1. Wait until it’s cold outside, with a soil temperature of 60 degrees Fahrenheit or lower. In the North this will be in September or October, in the South in October or November.
  2. Pick a spot in your garden that gets full sun.
  3. Find a well-draining container and fill it with loose soil, making sure water won’t gather and stay at the bottom.
  4. Plant the Dichelostemma corms about 3” deep and 4” apart. Since containers often have limited space, you can also experiment with placing the bulbs closer together, but make sure they never touch.  
  5. Water well once and wait for spring, or, when you live in hardiness zone 3-7, water well and bring the containers indoors, letting them spend the winter in a cool spot like an unheated garage or basement. 
  6. After the Dichelostemmas have bloomed don’t cut off the foliage. Leave it until it’s completely withered and yellow, then remove.

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