Gardening and Landscaping Stack Exchange
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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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Why do people say perennial food crops only produce for a few years?

When reading about plants I've heard that plants only produce for a few years, then die. Why can't they produce for as long as they're healthy?
black thumb
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Is there a good way to seed perennial vegetables between landscape bricks?

I want to convert this: To look like this: Here's a few thing I need to know: How far should I space the bricks? How far should I space the rows? How do I hold the soil back? What would be acceptable wall growing plants? What would be ideal…
black thumb
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How should I plant and grow Crosnes?

I've heard that Crosnes is a good crop to grow, and was wondering how to plant/grow it.
black thumb
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How to prepare herbs for winter?

I've got tomato, basil, rosemary, thyme and peppermint plants. I've read that the rosemary and peppermint are perennials. How do I prepare my [plants that should live until next year]? We had our first freeze two nights ago. I'm in central New…
CDspace
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How late into fall is perennial transplanting viable?

What is the generally rule of thumb (if there is one) for transplanting perennials? I have a bunch of hostas to divide and transplant. I could wait until spring, but wondering how late into fall I could get away with it. I live in Vermont, Plant…
Mapsy Daisy
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Why are chunks of my Sedum Spectabile snapping off at the stem bases?

Whole chunks of my sedum plant (which looks otherwise healthy) come away in my hand because the stem has snapped/cut clean through. What's causing this, and how can I prevent it?
andydavies
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Is this large-leaved perennial a weed?

Trying to decide if I should pull this. Anyone know what it is?
Paul Degnan
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Should my Gaillardia be emerging by now, in Zone 6?

I live in Massachusetts, Zone 6. Last July I bought a beautiful Gaillardia Arizona Sun. It bloomed all summer and into the fall. According to what I was told, as well as my online research, it's a perennial, however, there's no evidence of it so far…
Sue Saddest Farewell TGO GL
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Is there a temperate climate perennial succulent adapted to wet root conditions?

Is there a succulent plant that can grow in wet/swampy conditions? I've never seen it, but I think it would be an interesting change from the usual sedgy/grassy looking swamp plants that grow around here.
J. Musser
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How should I prepare a bed of Chrysanthemums for winter?

I would like to prepare a bed of Chrysanthemums for the winter. The plants have grown up to sizes of 1 to 1.5 meters, some of then have colapsed slightly because they evidently became to large. I've been told that the bed contains both perennial and…
Drux
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What's the best way to transplant Malva sylvestris Zebrina?

This is a follow-up question concerning Malva sylvestris 'Zebrina'. The plant has grown from seeds to more than 50 cm in height. I did not expect such a large specimen and would like to keep it around but in a different place in the garden. What is…
Drux
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Why are my hibiscus buds & leaves randomly turning yellow and dropping off?

Besides the random yellowing and dropping off of leaves and buds, the plant is otherwise putting out new buds and flowers pretty well. What might be causing this? The plant is in partial shade (3-4 hours of full direct sun, partial otherwise) and…
amol
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Kniphofia caulescens not flowering

I planted two Kniphofia caulescens in a sunny spot in my garden back in 2016. The plants have thrived and now form a sizeable clump. However, they haven't flowered for several years. Any idea why this might be? I live in west Essex, England. The…
Peter4075
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How to "clean up" a garden after everything has flowered?

Newbie question here. I am a first-time gardener; last year, I bought a house with a beautiful garden and I fell in love with the flowers, so I'm trying to learn how to take care of it. Over the winter there was a huge mess and I hired a…
Frank Thorne
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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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