I hear people saying thinning out plants. What do you understand under that?

I have Iris, Dahlias, Sunflowers, Marigolds, Snapdragon, Margaritas, Tropicana Canas. Lilies. How do I thin those out?and how do you do that?
The Iris were just planted now. I have another two Irises that were planted one year ago. They long leaves, the leaves are green and white arround their edges. And the center grows a blue flower buttons. My haven’t grown flower buttons this year at all. We hardly have any bee’s around.
Yes, there are flower’s that are called Margarithas. In German they are called Margarethe they look like sunflowers. They are yellow inside and white flowers outside. They grow like a tiny dwarf bush. I think mine I need to replant them some where else. Cause I think we had such hot heat, it’s killing them.
Also we had such a hot summer, even so my plant beds have automatic sprinklers, I wonder if the heat prevented the Dahlias from blooming.

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One Response to I hear people saying thinning out plants. What do you understand under that?

  1. RScott says:

    I don’t think I would do anything, With the exception of the canna and dahlia, which get put away for the winter. You didn’t say how long ago the Iris were planted but I dig mine up and divide them every 4 yrs. The rest of your plants should bite the dust as soon as you get frost. Too late for any thinning this year. If left in place for the winter your sunflowers and marigolds should re sow themselves. RScott

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