A plant that lives for two or more years.

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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 ...
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0answers
21 views

How can I identify the fuki?

I've heard that fuki is a vegetable big in Japan, and was wondering how I can identify it. Also what USDA zones can I grow it in?
5
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2answers
59 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 ...
5
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3answers
155 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 ...
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0answers
16 views

What's the difference between potato onions and bulbing bunching onions?

It appears to me that both potato onions and bunching onions are perennial onions that multiply at the roots. Most bunching onions probably don't bulb, and are grown for green onions, but some of them ...
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1answer
38 views
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2answers
51 views

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?
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0answers
47 views

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.
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0answers
36 views

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 ...
4
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1answer
117 views

Should perennials purchased at a greenhouse nursery be acclimatized before planting outside?

Most local nurseries in my area keep perennial plants outside during the summer months. There is one nursery which grows and keeps everything inside a greenhouse all the time. In zone 4 or 5, does ...
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1answer
135 views

What are these flowering perennials with white flowers?

What are these flowering perennials with white flowers (growing in a yard in Northeast Ohio)?
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2answers
54 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)...
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1answer
58 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 ...
12
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2answers
375 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 ...
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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.
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2answers
41 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 ...
4
votes
1answer
41 views

How do I subdivide mature chrysanthemums?

This spring, I bought little chrysanthemums (mums) of different shapes and colors at a neighborhood market. They have developed very well and now (in autumn) blossom in beautiful colors, e.g. yellow-...
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1answer
21 views

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 ...
6
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1answer
44 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 ...
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2answers
4k 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 ...
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1answer
40 views

Dividing Montauk Daisies

Also known more properly as Nippon Daisies, I have a planting of this stuff. I hadn't noticed it flowering last year and had planned on ripping it out this fall not knowing what it was other than ...
6
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1answer
93 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 ...
3
votes
1answer
34 views

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 ...
12
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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 ...
3
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1answer
37 views

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?
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2answers
244 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
votes
1answer
124 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 ...
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2answers
619 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 ...
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4answers
27k 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 ...
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3answers
42 views

How can I ensure my perennial herbs survive in an above ground planter (1.5' x 5') year round?

Never been much of a gardener, so 10 years ago I bought a house with a mostly asphalt backyard. So, different season of life now, my wife and I are starting a small garden of mostly food bearing ...
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1answer
31 views

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 ...
3
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1answer
76 views

What has caused my Bleeding Hearts to multiply and spread?

I planted three Bleeding Hearts last year. They were healthy and very pretty. This year there are seven or eight others all around the yard, as far away as fifty feet! They're even popping up under ...
4
votes
1answer
95 views

Ferns have not survived winter, what might be the case?

We are renting a flat with a nice garden in Leeds UK. It has a nice garden in the back yard and when we moved in in July 2014 there were 4 healthy ferns pleasing my eye. Now, with winter having ...
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1answer
105 views

Should I prune lavender on a cold/wet day in Spring?

I'd like to prune lavender for the spring season. Today it's a cold and wet day (2 to 7 degrees Celsius and some rainfall, in Europe), the weather forecast says next week will be sunny, but I'll ...
3
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1answer
100 views

Are both of these flowers chrysanthemums?

I was told that both of these plants (they grow as neighbors in the same bed) are chrysanthemums, and that one is an annual and the other is a perennial kind. Could that be right and if so what are ...
3
votes
1answer
91 views

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 ...
5
votes
2answers
874 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 ...
2
votes
1answer
50 views

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 ...
2
votes
1answer
90 views

How can I ensure that hellebores in 6" nursery pots survive the winter?

Earlier this year, I bought some hellebores (Helleborus niger hybrids) to plant in a shady spot near my Magnolia tree. I promptly forgot them, partly because of being ill for a couple of weeks, partly ...
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1answer
87 views

Can I dig up a wilting Begonia in the garden and turn it into a houseplant?

I live in Massachusetts and have some begonias that have been very happy all summer planted in a mostly shady area of my garden. The recent cold nights have caused the flowers to fall and the leaves ...
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2answers
3k 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 ...
4
votes
1answer
567 views

What is this carefree succulent flowering potted plant?

Anyone know what plant this is? It was planted in a large pot a long time ago by a friend. The dirt in the pot has not been changed for years! It blooms around the summer time and stays till mid ...
4
votes
1answer
120 views

How do I breed Black eyed Susans?

I've recently acquired a nice-sized Black eyed Susan (Rudbeckia hirta) plant. But unfortunately I've only got one, when I would like to have several. How would I go about multiplying this plant?
2
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1answer
287 views

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 ...
3
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1answer
115 views

Can somebody try to identify this potential perennial?

I was cleaning out some gardens and am not sure what this is. Is it a weed or not?
5
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1answer
549 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
66 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) ...
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4answers
1k 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 ...
3
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2answers
1k views

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 ...
5
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1answer
844 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.