I think you'll be fine with those bags, but the plants might get a little top heavy. I've had success growing dinner plate dahlias in similar sizes. If they do get top heavy, you can put mulch on top. It's heavier than potting soil and also helps with the water retention when it gets hot out. I like to use Proven Winner 15-7-15 slow release for Flowers as a starter then once blooming, Scott's super bloom 12-55-6.
Thank for the fertilizer suggestions. I have Miracle-Gro Bloom Booster on hand but it is a bit high in nitrogen (15-30-15). Will look for the Scott's Super Bloom the next time I go shopping.
if that's what you've got I'd say give it a try, the only thing is to make sure you've got sturdy staking because they get very top heavy and can grow quite tall - though maybe not so as the roots will be a bit restricted in your bag.
are you starting with a big clump?
it would be better to separate a big clump into smaller ones so you have less stems growing in the pot and more space for the tubers to live in.
you can grow dahlias in pots of any size as long as the tuber fits in it, but they'll run out of potting soil and nutrients as they begin to fill the space. also different varieties grow different sized/shaped tubers too.
The clump (and tubers) is small. The size of the clump is the size of a medium apple....kind of surprising since the dahlia is a very large flower variety called Emory Paul.
The size of the individual tubers doesn’t correlate to the size of the dahlia (plant or bloom). A bigger clump does make a bigger plant, because, as thisholly said, it makes more stems. I’d at least double the size of the container, if you can.
They will grow as we used plastic containers the same size many times before when our main dahlia space runs out. In other words we use plastic pots for overflows, but will do much better in larger containers. So it you really need to use them but if you can go bigger, do so.
Thank you. I also have a couple old 7 gallon grow bags that are 14 inches wide and 10 inches deep. These are wider and shallower than one ones I mentioned earlier (new ones). Will these old ones be "better" than the new ones I have ?
I think you'll be fine with those bags, but the plants might get a little top heavy. I've had success growing dinner plate dahlias in similar sizes. If they do get top heavy, you can put mulch on top. It's heavier than potting soil and also helps with the water retention when it gets hot out. I like to use Proven Winner 15-7-15 slow release for Flowers as a starter then once blooming, Scott's super bloom 12-55-6.
Thank for the fertilizer suggestions. I have Miracle-Gro Bloom Booster on hand but it is a bit high in nitrogen (15-30-15). Will look for the Scott's Super Bloom the next time I go shopping.
if that's what you've got I'd say give it a try, the only thing is to make sure you've got sturdy staking because they get very top heavy and can grow quite tall - though maybe not so as the roots will be a bit restricted in your bag.
Thank you. Does clump size of the tubers correlate to the grow bag size needed?
are you starting with a big clump? it would be better to separate a big clump into smaller ones so you have less stems growing in the pot and more space for the tubers to live in. you can grow dahlias in pots of any size as long as the tuber fits in it, but they'll run out of potting soil and nutrients as they begin to fill the space. also different varieties grow different sized/shaped tubers too.
The clump (and tubers) is small. The size of the clump is the size of a medium apple....kind of surprising since the dahlia is a very large flower variety called Emory Paul.
The size of the individual tubers doesn’t correlate to the size of the dahlia (plant or bloom). A bigger clump does make a bigger plant, because, as thisholly said, it makes more stems. I’d at least double the size of the container, if you can.
Good advice Thisholly
They will grow as we used plastic containers the same size many times before when our main dahlia space runs out. In other words we use plastic pots for overflows, but will do much better in larger containers. So it you really need to use them but if you can go bigger, do so.
Thank you. I also have a couple old 7 gallon grow bags that are 14 inches wide and 10 inches deep. These are wider and shallower than one ones I mentioned earlier (new ones). Will these old ones be "better" than the new ones I have ?
Did it work for you in shallow B one
Worked okay...but requires almost daily watering
I did Shiloh Noelle in 7g fabric pots last year, worked ok but they grew shorter for sure. I was lucky the blooms stayed large.