Chamaecyparis obtusa - any cultivar. They either succumb after a year or two or most of the foliage turns brown and looks like crap. I quit trying this year after too many loses.

I have killed one of those too mrgpag. My second one, a lot of the top part died off (during the winter), so that next summer, I constructed a little dirt mound on its north side and this past winter it did not brown and is recovering. I have only ever gotten the "Hage" variety. Have you kept them out of those drying winter north winds?

Rhubarb. I don't know what I continually do wrong but it'd died four times now.

Janet

Rhubarb. I don't know what I continually do wrong but it'd died four times now.
A friend of mine also had problems with getting rhubarb to live. He said the little plant would just disappear. I told him the only thing I could think of was that possibly some underground varmit was getting it and pulling it down and away. I'm not sure if he ever succeeded or not.
If I have something die, or not do well, when I get a new one, or the opportunity, I move the existing one. A 'new' spot usually helps a lot.

Sue

I start out with nice roots from Indiana Berry Company and they look good for a month or so and then they start going downhill. I had one make it through the winter last year and it looks really spindly. I changed where I planted it thinking there was too much clay underneath it but it doesn't like the new place either. I'm going to try it one more year and if it doesn't take I'm done throwing money down THAT hole!

Janet

LOL Great topic.

I couldn't tell you how much money I have spent on roses. I think I would even kill artificial ones.

Oh and African Violets. Lots of money spent on those.

Sorry about the African Violets. My friend grows those and he only puts water in their catch plate. Maybe that will help? I always kill orchids or at the very least they have never bloomed for me. They start to bloom and then the flower buds dry out and fall off. lol

Also, I killed a Balsam Fir, but my Caucasian Fir as done great! :)

I can't seem to keep gaura going more than one season. I've tried & failed multiple times with lupines, burgundy gaillardia, tradescantia, verbascum.People tell me that foxglove will self seed & come back, but not for me so far. Finally got the scabiosa & moonbeam coreopsis to take. With roses I'm batting about .500--but it's always the ones that I most want that die. However--plants that I didn't know could be garden thugs ALWAYS do well for me...

Lupines haven't done well for me either. Either the heat or rabbits (or some other critter) is eating them. I have some Lupines in a little cage with sun and shade and they do a lot better. They actually came back. My Gaura came back and it was my first time trying those. My Gaura is in a rather hot and dry spot.

tradascantia (is that hhow you spell it?) fine strappy leaves, small clusters of blue 3 petaled flowers. spiderwort? and lately virginia bluebells. yes i cann't grow what some people call weeds.

diggerb

Cactii...I think I'm too attentive. :)

Roses, I can grow those.

Eric

I am embarassed to say it but I routinely lose Shasta daisies (Leucanthemum sp) even though I don't have trouble with many other perennials. However, one little clump I threw under a lilac and mugho pine that is being overcrowded by feverfew seems to be prospering.