Alliums, also referred to as flower or ornamental onions, start as bulbs. You will find many variations in height, form, and color.
The purple alliums are some of the prettiest of the bunch.
Have you found that your purple alliums are now turning white? Before you yank the bulbs out and start over, we’ve got some tips for you to try.
Determining Why Purple Alliums Have Turned White
1. Did You Accidentally Plant The Wrong Bulbs?
It could very well be you mixed up the bulbs for your alliums when planting. It can be easy to do.
It is something all of us have done in some form or another.
Many a vegetable grower has mistakenly planted zucchini instead of yellow summer squash.
Or perhaps watermelon instead of cucumber. If seeds and bulbs are not correctly labeled, mistakes can happen.
If this could be the case, you can simply dig up the bulbs and relocate them. If you don’t mind them being white alliums, just leave them be. They’ll bloom for you, year after year.
While it is irritating to have to relocate your plants, it’s a quick and easy solution.
Alliums are very hard plants. They respond well when transplanted. It also serves as a reminder to label and store your seeds and bulbs correctly.
2. Could It Be A Fungal Infection?
Take a close look at the blooms, the stalks, and the bulb.
Are they covered in a type of fungus? While not always typical, certain types of fungal infections can take over.
It may be best to cut your alliums back or pull them up entirely. There’s no telling how far the fungal infection has spread.
There are several treatment options you can get from your garden center to try. They may help to keep the infection under control. Keep in mind that fungus loves moistness.
It could be that your soil is too soggy, and that is fostering the growth of the fungus.
If this is the case, consider watering them less next time that you plant them.
You should also consider amending the soil, to ensure it is better draining. This isn’t a very straightforward fix.
It is possible, however, to quickly eliminate fungus from your garden. Remove the infected plants or try to treat them.
Most gardening pros will recommend that you outright remove the infected plants.
The soil can then be treated with antifungal products that will help to keep the fungus from re-infecting your garden next growing season.
3. Is The Soil Too Alkaline?
Plants have different needs when it comes to the PH of the soil. Some prefer much more alkaline soil. Some thrive in more acidic soil.
A simple soil tester kit, easily bought from your local garden center, will let you know where your soil is.
From that point, it’s easy to adjust the soil.
Your alliums will thrive in soil that’s just this side of being too acidic. Quite like tomatoes do.
You can get additives from your garden center to boost the acidity of the soil in no time at all.
Acidifying fertilizers may also be added to the soil in order to increase the acidity levels.
Adding products that contain ammonium sulfate or ammonium nitrate are excellent additions to increase soil acidity.
This is a reasonably simple fix most gardeners will have to face at some point.
Knowing the PH levels of your soil will help to make you a better gardener.
You’ll know what your plants need. You will be able to meet those needs. Test the soil after each growing season, and adjust accordingly.
4. Are They Naturally Dying Back?
It could very well be that the pretty purple color is fading from your alliums because it’s just that time of the season.
Many of the vibrantly colored alliums will lose their color when they start to die back.
The plants will lose their color; the purple will fade to white. But they will retain their ornamental shape.
This can be a fun addition to your summer garden. You can, of course, cut the plants back entirely.
Many gardeners love to use the dried out blooms indoors as a part of a fun floral centerpiece.
If the plants are simply following their seasonal pattern, there’s not much to be done. The purple color can’t be restored. At least not until next spring when they pop up for you again.
Knowing when your alliums are done for the season can help to indicate when it’s the right time for planting other things.
Understanding the seasonal timing of your garden can help you with your planting schedule.
What Is The Best Solution?
There is no one right solution for this concern. Many factors can be contributing to the purple fading to white.
Identify that factor, and you’ll know the solution that will work best for you and your garden.