Questions tagged [perennials]

A plant that lives for two or more years.

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16
votes
3answers
1k views

Which herbs can be grown as perennials?

What are some herbs that are perennials, i.e. they return and grow the next season? I'd like to keep a garden of herbs around for cooking.
15
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4answers
36k views

Can dahlias be grown as perennials?

The wikipedia article on dahlia says that they are perennial plants. However, the dahlia section at my local garden center claims (in their little info booklets) that they are annuals. Upon further ...
15
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2answers
404 views

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 ...
13
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4answers
1k views

Hardy edible perennials that are easy to propagate?

I'm looking for hardy (USDA Z4/Z5; -15F winter lows) perennials (or low maintenance reseeding annuals) that are easy/reliable to propagate either via cuttings, division, or seed. The growing season is ...
12
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3answers
2k views

What are some tall, narrow perennials suited for dry soils, sun & shade?

I have an herb garden that stays quite dry. Although this garden is in the notoriously wet Pacific Northwest (USDA zone 8a), it is against a two story south-facing brick wall, under a large overhang, ...
11
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2answers
291 views

Are chilis an annual plant?

Are chili plants an annual plant? I have read on the web that they are perennials. But mine have never lasted more than a year.
11
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1answer
280 views

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 ...
8
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2answers
2k views

How do I prepare a chili plant for a second year's growth?

I have finally managed to make one of my chili plants (variety unknown) live into its second year! I've kept it indoors so far this winter. As it will be spring in a couple of months (I'm in the UK), ...
8
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1answer
88 views

How to plant herbaceous perennials under an existing tree without harming it

I've seen beautiful plantations of herbaceous perennials plants under mature deciduous trees and I would like to plant something similar. My concern is for the tree itself (an Autumn Blaze maple in ...
7
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3answers
167 views

Hearty Flowering Perennial for curbside appeal

I'm lost in a sea of articles with none of them actually answering my question so I turn here. Currently I plant mums every year in my front yard (Midwest region: Kansas, Lots of sunlight on the area)...
7
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2answers
3k views

How can I tell what animal is eating my plants?

Many of my perennial garden plants have been getting eaten by some animal. Possible culprits include deer, rabbits, and groundhogs. I would like to control them, but I have to know what I am ...
7
votes
1answer
200 views

A seedling with three (instead of two) cotyledons

I started 44-cell tray of Echinacea angustifolia several weeks ago. I noticed the other day that a seedling in one of cells has three cotyledons: Is that normal? This is a cell with two "normal" ...
7
votes
2answers
821 views

What is this pungent plant with spikes of purple flowers?

This plant is flowering in our garden. The leaves are gray/green. It has small spikes of purple flowers all over, which are a few inches tall. It has a peculiarly rich smell which I rather love, but ...
7
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3answers
10k views

What is this six-petaled white flower with long narrow leaves?

Growing on the edge of my yard I have a small clump of perennial plants that produce small white flowers in late May or early June. The flower itself is white, with six petals, and they are produced ...
7
votes
1answer
707 views

What is this low growing square-stemmed plant in my lawn?

I have a small, dense, spreading herbaceous perennial plant in my lawn. I don't have anything against it, but I would like to know what it is. It has slightly square stems and rounded leaves. It has ...
7
votes
1answer
615 views

What is this plant, which has a spreading root system and purple, crinkled petunia-like flowers?

Click to enlarge This is a hardy perennial that grows up to 5' tall. It has a spreading root system and purple, crinkled petunia-like flowers. What is it?
7
votes
1answer
200 views

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 ...
6
votes
2answers
84 views

Caring for & maintaining thyme

We have some thyme in our perennial bed and after seeing that it is quite frost hardy I'm realizing I don't know much about this plant. Specifically, I'm interested in how best to keep harvesting ...
6
votes
1answer
242 views

What is the name of this low-growing plant with pink flowers?

The plant is small, just about 4 inches tall, growing in my front yard, in Sydney, Australia. The leaves are grass like and the little flower is quite fragrant. I just can't recall the name, can ...
6
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2answers
3k views

Can I save the berries from a Big Blue Liriope (Liriope muscari) and plant them next spring?

I have a big blue liriope (Liriope muscari) in my yard, and the flowers have changed to berries. I imagine the normal propagation method is to split the adult plant after it grows large enough, but if ...
6
votes
2answers
19k views

Coleus - annual or 'tender' perennial?

So I picked up a couple of mid-sized Coleus plants (a 'Ruby Dreams' and a 'Dream Catcher') from the local nursery today. I plan to put them in a shady area which gets indirect light for a few hours a ...
6
votes
5answers
16k views

What's the best way to grow Crocosmia from seed?

I collected seed from my Crocosmia (I believe "Honey Angels") and I'd like to see whether I can get healthy plants from them or not. What are the right conditions to make them germinate? When do I ...
6
votes
2answers
248 views

Can I leave an Aloe plant unattended for 2 months?

I leave my apartment for 2 months and I'd like to know if you have any advice to keep my Aloe alive all this time? I live near the Mediterranean and my balcony is exposed to the sun from 1:30 pm to ...
6
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2answers
496 views

What is this northern California perennial with variegated leaves with dark red lines on them?

This is a perennial, growing in moist, shady conditions in northern California. Does anyone know what it is?
6
votes
1answer
892 views

What is the medium-leaved, thick-stemmed plant?

This plant was at the end of driveway, getting tossed by a previous owner. I'd like to care of it but I have zero idea what it is. Does any one know a likely candidate?
6
votes
1answer
67 views

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 ...
6
votes
3answers
1k views

What is this tall perennial with fragrant white flowers?

My grandmother brought me a bunch of shade-loving plants from her garden to help me fill in a few gaps in my own. She had most of them identified but this one had her stumped. Here's what I know from ...
6
votes
1answer
257 views

What flowers and shrubs will grow without outside help?

I would like to plant some shrubs and/or flowers in a mostly wooded area behind my house (in NE Oklahoma). What are some good candidates that are (1) cheap, (2) perennial, and (3) hardy enough to ...
6
votes
1answer
175 views

Recommendations for removing a plant from a perennial border

I'd love some recommendation on the best way to remove Lysimachia nummularia 'Aurea' from a perennial border. A little background: The border never really goes fully dormant, and is layered with ...
6
votes
1answer
75 views

What should I consider before vacuum-sealing seeds for storage?

This year I have harvested more seeds than I will use next spring. I plan to vacuum-seal them and I want to know if, except for drying them really well, I should consider anything in particular. ...
6
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1answer
1k views

Please help me identify this bulbous plant with long, broad leaves and white flowers

I rescued this plant from a landfill in Johannesburg, South Africa. It has taken well in my garden and is blooming in just the second season that it's been here. When I rescued it, I thought it was ...
6
votes
1answer
92 views

What should I do with perennials in pots over the winter?

I had a small stone planter box built in to my front entrance. In this planter I had a handful of perennials. I needed to have my driveway torn up and repaved this year, and I thought it would be ...
6
votes
1answer
413 views

What would be a good “cat grass” for the central Texas heat?

So I can buy the little pots of "cat grass" or even the grow kits at my local pet store, but I thought it would be more fun to have a little patch of it growing in the yard that (hypothetically) would ...
6
votes
1answer
84 views

Mystery emergent foliage (bulb?) USDA zone 5

My mom is an avid gardener and works in many gardens close to her. This plant popped up last week but she’s unsure of its genesis. She can’t inagine having planted two bulbs so close together, but ...
6
votes
2answers
112 views

What is this small field plant with a tuberous root?

This plant was collected in a field South-Central Europe. Assume the height of the photo is 20cm. These are all small herbaceous plants. The ball next to it is the root. It has small bag-like ...
5
votes
4answers
4k views

What are some recommended perennials to grow under large spruce trees in an area of about 350 sq. feet?

I have a small area which I would like to fill with (hopefully perennial) foliage plants, to green it up. I was thinking a variety of different hostas would fit the bill. If this was your bed, what ...
5
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2answers
1k views

What is this whitish feather on my Echinacea seedlings?

My multicell container with Echinacea seeds was covered with a transparent nylon cover for several days, and I just removed it, and spotted an unusual thing. Take a look at this white stuff in the ...
5
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2answers
43k views

What's the difference between annual, biennial, and perennial plants?

Before deciding whether to purchase a plant, and how best to plan where to place it, the basic knowledge of how long it lives and how often it blooms is a necessity. What's the difference between ...
5
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2answers
6k views

What kind of shrub with long green spiky leaves is this?

I got stuck in the forehead by one of the spines Wednesday and it is still sore. It bled a lot Wednesday. Yesterday I popped it and some pus came out. It is still red and sore. I just want to check ...
5
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1answer
3k views

Which grass is best suited as an indoor perennial?

I would like to decorate our living room with a strip of grass. Which type should I grow? The requirements are as following: should be a perennial or at least grow for a year or so slow growing, ...
5
votes
1answer
2k views

When should Bee Balm bloom in Zone 6 (it did not bloom last year)?

Two years ago we planted some bee balm. We trimmed it back in early March last year and it never bloomed, though the plant was otherwise healthy and bushy. We trimmed it back again this year. Is ...
5
votes
1answer
424 views

Help identifying this perennial grass-like plant

I live in Ohio and just purchased a home that has this decorative grass-like plant that grows in tufts pictured here. It didn't seem to bloom last year, but this year it did (then again, I ...
5
votes
1answer
68 views

What is this perennial, mauve flowering herb?

I am trying to identify flowers by the photo I have. Everything I know is that they are: Perennial flowers Spring flowers Grow in Eastern Europe I have been trying to find them using Google ...
5
votes
1answer
74 views

Why does my garden centre say these plants are annuals?

I'm in the UK (so hardiness zone 8/9), and my local garden centre is selling Chrysanthemums and Michaelmas daisies, labelled as "one season only". I'm sure as a kid my gran had (the same) ...
5
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1answer
110 views

Mint ID Requested

This mint came with the house. 30 years ago. It is beautiful and about eight feet tall. I was wondering if anyone knows what it is. Definitely mint. Thanks in advance.
5
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1answer
135 views

Can a Mexican sage survive losing all its stems?

We planted several Mexian sages (Salvia leucantha) 3-4 weeks ago. They had taken very well to our hot, dry weather (Sacramento, California - Zone 9) and being watered on a drip system. Here's a ...
5
votes
4answers
7k views

What is causing my lavender's leaves to turn grey and wizen?

I am trying to grow a lavender plant on the windowsill of my apartment in Brooklyn. I got this more succulent lavender after some more delicate french lavender had died on the same sill. This plant ...
5
votes
2answers
86 views

What is this daisy with narrow white petals and a yellow center, that the local deer won't eat?

This daisy popped up wild. It has narrow white petals and a yellow center. The local deer don't like it. It's located in the central California coast. The ground is dry, rocky and semi-shaded. ...
5
votes
1answer
4k views

What is this 2' high plant with curved spikes of white flowers, growing in eastern Massachusetts?

Please identify this plant. It is about two feet tall and thriving in the shade of large trees near the edge of a small street.
5
votes
1answer
6k views

What should I do to make my strawberry a perennial?

http://homeguides.sfgate.com/care-tristar-strawberries-45860.html says that Strawberries grow as perennials in U.S. Department of Agriculture plant hardiness zones 3 through 9, depending on the ...