I love delphiniums and wish the beautiful, tall, blue flowers would last throughout the summer. They do not, of course, but with this simple tip, you can actually get these gorgeous, flowering giants to bloom a second time within the same growing season.
For more delphinium growing tips, also see Delphiniums: Growing Tips and Tricks.
How to Make Delphiniums Bloom Twice in One Season
Here’s how it works. You have to be brave. When a delphinium has finished blooming, if left alone, the flower head is going to gradually turn to seed.
Your choice is, do you want seeds or second blooms?
If you want seeds, you just have to leave it and wait. The plant will put its energy into seed production.
If you want more blooms, it’s a bit of a race against time, before fall frosts set in.
- As soon as the flowers pass their peak, you have to remove the entire flower stalk. By doing this, the plant will now put its energy into sending up more flower shoots instead of working on seed production.
- To remove the flowers, follow a stalk all the way to the ground and cut it off as close to the ground as possible. Do not remove any surrounding leaves or foliage.
- It’s a bit sad to do, as even the aging blooms can be very pretty, but, suck it up, Buttercup, as the saying goes, put the cuttings on display somewhere, and, unless something weird happens, you will probably have a second set of blooms before the frosts set in. The sooner I snip off the first set of blooms, the more success I have with round two.
And that’s it.
If you have several plants, you can always choose the best ones for seed saving and the rest for second blooms.
Other Flowering Plants that Can Bloom Again
Cutting back or deadheading first blooms to get second blooms can also work for several other perennials including:
- Bleeding heart
and, many flowering annuals.
For more, see my best delphinium growing tips here.
Want to grow from seed? These seed listings on Amazon will give you an idea of all of the colours and varieties available. Personally, I’m all about the periwinkle blue ones.
More Propagation Tips
Succulents, clematis, delphiniums, sweet potato vine, shrubs, vines, veggies, and more.