Should I Deadhead My Knockout Roses?

Filed Under: Roses · Keywords: Should I, Dead Head, Knock Out Roses, Pruning, Method · 2979 Views
Do i need to deadhead my knockout roses? They are alomost finished with their first bloom and are starting to look messy. Last year we did not trim them in Jan/feb and the bloom in the spring summer was short and lacked color. This year we trimmed them and they are much better but looks like it needs deadheading now.

Also - how manymore times will they bloom this season?


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Answer #1 · Brooks Wilson's Answer · Hi Leah,

It's a great idea to dead head your Knock Out Roses. The best way to prune them is to follow, from the faded blooms, each stem back to the first little branch with five leaves. Prune just above that branch. New growth will emerge from this point. The new growth is where new buds will set. If you don't have the time to go through this procedure you can simply snip off each faded bloom out at the tips of the outer branches. Both methods work. The first method, however, works a little more effectively. By using the first method mentioned here you will see your next heavy cycle of blooms a week or two earlier, and the amount of blooms will be greater. Fertilization is key as well. A slow release fertilizer is recommended. I personally like Dynamite fertilizer. It has a nine month release meaning that it lasts all season with one application. Another good fertilizer is Milorganite. Especially if you have a deer problem. The Milorganite repels deer, and we know that deer feast on Roses. Milorganite also contains 4% iron for greening and is non-burning. You may want to apply Milorganite about 2-3 times per season.

Hope this helps you!

Brooks Wilson))


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Leah Boccia

Leah Boccia · Gardenality Seed · Zone 8A · 10° to 15° F
thanks! very helpful!

2 years ago ·
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Answer #2 · Brent Wilson's Answer · I deadhead my Knock Out roses throughout the season as Brooks mentioned: by pruning back to just above the first five-leaf branch. This helps control the height of the shrub and produces heavier blooming.)



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