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Questions tagged [perennials]

A plant that lives for two or more years.

A plant that lives for more than two years - i.e. not an or .

In horticulture, the term is often used to refer to only herbaceous perennials (those that die back in Autumn and then grow again from the root stock in spring), although technically woody plants such as and are also perennials.

Use this tag for questions about perennials in general. Questions about specific plant families or species should use the appropriate tag for the family or species.

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Do perennials need to be split?

This Old House recently published an article about splitting overgrown perennials. They suggest doing so every three to six years--however, I have a large bed of daylilies, and it's hard for me to imagine how they'd be considered "overgrown." Is…
glenviewjeff
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Are goldenrod cultivars manageable or troublesome?

We have a tough dry spot in the garden (USDA zone 4) about 2' x 5' where a goldenrod cultivar would go nicely. The native species, although attractive, has a tendency to seed freely and be almost impossible to remove. Are the cultivars more…
kevinskio
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Is Poke Milkweed nice or nasty?

I am growing this from seed: Asclepias exaltata which is not the poisonous pokeweed Poke Milkweed Height .5-1.5m Zone: 4 The grower, Gardens North, claims it is: Found in the wild in rich woods and forest edges, with elegant sprays of…
kevinskio
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Do I cut back all herbaceous perenials in fall?

I live in zone 4. I have been instructed to cut back some of my herbaceous perennials plants before winter. Should I do this to all herbaceous plants? If not, how do I know which ones to cut back and which one to leave "as is" or just partly pruned.
Gilles
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Pretty little flower but identity unknown, any ideas?

I ordered datura seeds and received 10 seeds in a clear ziplock packet, no label or instructions. I planted 7 undamaged seeds and only 1 came up. It is not a datura, but no one seems to know what it is & last week it surprised me with a tiny…
Bobbie14031
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What are differences between Echinacea purpurea and Echinacea angustifolia?

One of my most important gardening goals for this year is establishing echinacea in several parts of my garden. So I ordered several bags of echinacea seeds from a seed shop. (I actually didn't pay attention on the exact latin name) However, I just…
VividD
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Can a plant that grows back from the roots each year be considered a perennial?

I have a pot with mint plants growing in it. These plants die off in the winter and resurface from the ground in spring each year. Does that make the mint plants perennial? If not, is there a special term for these types of plants instead?
Maurice
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How to cure burns in perennial flowering plant's due to dose of excess urea?

I had planted few stone apple plants (perennial, flowering and mid summer fruiting trees) in plants. Due to insect larvae most of leaves were eaten. So I put in handsome amounts of Urea, Diammonium phosphate, and Potassium Chloride in the pots in…
Aryan Gupta
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How long does Symphytum orientale, white comfrey, live?

How long does Symphytum orientale, white comfrey, live?
John Nygate
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Why does my snow in summer look terrible after flowering

Snow in summer looking bad after flowering. Does it need to be cut back
Laura Colaiuta
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