Supporting tomatoes in growbags

[Rustyigloo]

Hi,
I'm growing tomatoes in growbags this year as ive run out of space in my veg plot.

I have the growbags on concrete so I'm not able to stick supports in the surrounding soil. How do I support the stems? They're just at the stage where they are starting to flop over.

I was hoping not to spend a fortune on anything too fancy! Any advice would be appreciated.

We have a version of these. Also useful to avoid water everywhere.

I turn the grow bags upright, remove the half the soil, pop a bit of sharp sand in the middle and poke drainage holes here.
Plant as much as possible 6-8" height of the plant into the grow bag and put the training soil in.
You only want a 1/4 of the plant sitting above the soil.
In turn the plant gets desperate for water and the roots grown down to the bottom of the bag and are very strong!
No need for a climbing frame or canes, it will support itself
Great tip from my grandad who worked at Kew Gardens!

I tip the growbag soil into a pot and use that. Deeper for roots, you can put in canes, takes up less room.

Ahhhhhhhhh ok. I've already made the mistake of planting them. I didn't really think this through did I? 🙄

I purchased wigwam grips for mine and built tripods with canes. I then decided that the growbags are too shallow so ended up getting plant halos too which has made watering and feeding so much easier, as well as increasing depth. The set up seems to working well so far.