3,226 Garden Web Discussions | Dahlias

Well! That's what I like to hear! Thanks very much. Their pots are of ample size for now, but once outside, they'll either grow in the ground or larger pots. And yes, they are by a nice bright window - their greenery, after a long cold winter, is lovely in itself.
Anna

Last year I grew several in 3 gallon grow bags (just black plastic bags with a flat bottom and drainage holes.) Some of them flowered before I put them out. I left them in the grow bags sitting out in various places in the yard. Worked very well because I didn't have to dig them up again. Only drawback is that you have to keep an eye on watering them frequently. saw no difference in the number of flowers from the ones planted directly in the ground (dahlias have really shallow roots anyway.)

Beautiful, Poochella, I really like it. In response to your question, no I could only see the X.
I wonder what the picture looked like on the package that Sybilkrizinski purchased. Maybe he/she will respond and let us know if it was like yours Poochella or more like mine (similar to the posting I gave).


They work very well- esp. if you're growing in pots. I think the Colorado Dahlia Society site has a bit about tomato cages on it- they turn them up-side down but when I used them in pots I just stuck them in the normal way & they held the plant up fine. The only problem might be if you have really tall dahlias they might flop over the top.

I have a few tomato cages, bought several as well as those 4' square cages. Last weekend, a neighbor cleaned up his garage and threw out five 4' metal plant stands.... They are sturdy and when turned up side down, they stand just like tomato cages shown on the Colorado Dahlia site, except taller. I just used one for my brand new 'Camano Pet'. I might have to add a taller stake later. I use bricks to anchor the stand for now. I'll have to see if the bricks will be enough.

Do gophers do this to your lawn and gardens? This was early March and there were plenty of mounds inside the garden beds as well.
One year I stood in amazement and watched a 2 ft tall dahlia jig left, then right, back left and right. Thought I was losing the last remnants of my mind! Seconds later, out of the shredded leaf mulch popped a mole!


Thanks poochella for those measurements, that is exactly the information I was needing. I don't have a lawn but yes they do that to my garden. They are devastating. Last year they ate three 50' long rows of perennials in a matter of a few weeks. I built a homemade gopher blaster this year and I expect to be rid of them by the end of summer. Blasting their tunnels and caving them in to rid my garden of the network they have mined throughout the years should help get a handle on the situation. Combined with trapping and wire cages, I may be able to keep a perennial around for more than half a season. Someday I will tell you about the corn stalks they were pulling down in their as I stood there and watched. Dana

They are usually planted horizontally because some can have very long tubers & you don't have to dig as deep a hole to cover them if as you would if planted vertically. Some people plant them vertically & declare the tubers are then in neat rows around the stem - easier for cutting but someone in our dahlia society did an experiment -- some planted one way, some the other & brought them to a meeting in the fall. We couldn't really tell which had been planted which way on most of them. A very few looked like they were in rows but the rest had the usual clump.

Thanks for your input. I think I'll leave the vertical tubers as they are. I've placed another order from Swan Island--these will go directly in the ground, so I'll plant them horizontally. If nothing else, I'll learn something from this!
Poochella, land is plentiful and cheap here--otherwise I couldn't afford this piece of the forest!
Valerie


After 6 years of having started my garden, something was munching on my oriental lillies and hydrangea this spring. I went out at night with a flashlight, only to find three caterpillars. I guess there may be more, but just getting rid of these three seems to have helped the plants a lot. At least they are growing faster than they are being devoured so far.

I don't understand where they get that Crazy Love is a short border dahlia? It took mine a few years to get going but last year I had a massive plant that was taller then 6" and completely submerged my big Othello rose bush. That thing must have been atleat 6' each way before the lower branches lay down and spread! I could pick a whole bucket of just "Crazy Love flowers every second day off it!.
IT really is a beautiful flower!
And the edging is more purple then pink, but very delicate. A great cutting flower!

Zone 4, and your last frost date is Monday ? ? ?
Interesting, I am zone 5, and our last frost date, as printed in yesterday's paper is May 30th.
I would be getting them uncovered in the warm days, but still be prepared for a frost when you can cover them with an old sheet or such.
There are theories about the development of tubers if they are planted deep. I would think that if the lower leaves were removed, and that is all that is done, then there would be no significant difference. However, if there was some hilling of soil, or the plants were planted deep enough to cover the defoliaged leaf node, then there may be more tubers formed. That is just a thought though with no scientific proof to back it up.

OK, It's actually about a week away, but am afraid if I don't get the started dahlias in their assigned beds the beds will be lost to my 150 annuals I have to set. Figure to put them down 4 to 6 inches and fill in the hole around the shoot as growth continues.
Set my "new green stakes" in the beds. That should discourage annual setting!!!! Do you think 40 Blue Butterfly delphiniums (the little short edging delphiniums I started myself--about 12 inches tall) around the edge of the bed would have room?
Or would 4 or 5 magic fountain white delhpinium with a dark bee be good down the center of each bed instead of the center row of dahlias? I'm setting the dahlias 2 foot apart in all directions, and if I eliminate the center row to delphinium_____ suggestions welcome. Or would alyssum hanging down over the edges of the raised beds be better???

We are getting similar weather now as well, but if one looks at the long range, I still see a lot of dips in the evening temperature. This Thursday, we go down to just above freezing, but the next day will be in the 80's. Strange weather extremes!

HI,
I wouldn't chance it I'm zone 6 and it has been pretty cold here I'm not planning on planting any Dahlia out until June.
I left a Dahlia seedling out on my front porch (enclosed by glass windows) the other night it was around 40 degrees and the seedling turned to mush.
Today I read in a gardening magazine not to plant dahlias until the soil temp is a steady 65 degrees.
You could start them in pots inside the house to get a head start. I have some tubers in 10 inch hanging baskets from last years flowers they are doing great soooo tall!
Just be sure to remove the hanging device if you use them.
Good Luck!
Laura

I bought seven dahliettas last summer. I put six of them in a half-size whiskey barrel planter with good-draining soil (lots of perlite), located where they get full sun most of the day. They were given a good sprinkle of time-release fertilizer over the soil surface to feed them for several months. One went into a garden with marigolds.
With deadheading, they did very well right up until cold weather. I dug up a couple to try and overwinter, but they shriveled up (should have wrapped the tubers in saran/cling wrap.) Much to my surprise, though, four out of the five left in the planter have come up and are putting out leaves like crazy in the past couple of weeks. (I'm in Zone 6, but the weather has been more like a z 7 or 8.) The one I left in the garden has come up too, tho' it's obvious slugs or some other critter has been snacking on the leaves, under the pine straw mulch.
I'll fertilize them again and hope that they flower this year, too. They really don't get too large, so if you're only planting one, a 6" or 8" pot should be roomy enough.
The only thing I didn't care for about dahliettas was that the flower stems were quite short, so that the flowers were often hidden among the foliage. Too bad, 'cause they were very pretty.
LindaSkyview

Thanks,
I have a 8 inch pot I'll try it in that. I tried some from seed with no luck. I'll try the paper towel method in a week or so I'd like to get a few started from seed. I couldn't belive how many flowers the one I purchaced had on it. It's beautiful.
Thanks again,
Laura


Oops. I thought I was in the brugmansia forum, as a similar discussion takes place there. That's what happens when one has two windows going at once. Sorry about that.
Okay, to answer your question about dahlias in a pot. I think that you could do this as well with dahlia. It may however stunt the growth somewhat, but probably not significantly ( unless you were planning to show ). The advantage of doing so would be that it would be easier to lift, and then separate the tubers later. Just be sure that you use as large a pot as possible ...2 gallons or more. I had one tuber that was over a foot long last year which was grown in soil in my front garden. I was surprised how big the tubers can actually get.
I haven't tried this with dahlias but perhaps an experiment is in order. I love to experiment. Last year, I grew tomatoes hanging upside down from the bottom of the pot as an experiment, but this year won't do that again, as the produce was down significantly. I had heard that it would work so thought why not, (for the cost of a few seeds).
I think it depends on how wet your summer is. If you have really dry summers this will probably work well as it will help hold in some moisture. If you have wet summers, you might want to leave them above ground so that you can monitor for rot and provide better drainage.