Recommendations of plants that grow tall but are spindly/flimsy please

Hello! I'd like any recommendations of plants to grow in my flowerbed that grow tall, are perhaps 'grassy' with spindly/flimsy branches. Reason for wanting this is we are planning to have cat defences installed to give our house cat outside space and keep other cats out of our garden (as ours is VERY aggressive and territorial so we really don't want fights). These cat defences will be bought and are a bit fence like so any plant growing in front of it would have to be spindly so it can grow upwards beyond the height of the cat defences through the holes, and also, very importantly, even if it is reachable by another outside cat, the other cat will not be able to jump easily onto it because it will give way. Is there such a plant (that grows beyond 2m)? Many thanks!

 

Is it the type with a curved mesh topper running along it's top length.? Do you want plants to grow through it?? It might be better to plant up clear of the fence,

 

Hello! Yes, this is the product I'll be buying, it attaches to existing fencing

 

Hi, yes it kind of is, have posted a pic above.

 

Anything soft and flimsy is likely to be an annual climber.

Mature deciduous or evergreen climbers like Ivy will probably present a set of branches that cats can move around on, and plants like Ivy also attract other wildlife like birds, so it will probably bring in more cats !

For an annual climber things like Nasturtuim may cover that height and spread for a few months of the year, but what then ?

For something evergreen then Pyracantha with its wicked thorns will stop cats, as we have seen first hand, but, as with other such plants, would take several years to cover such an area.

 

Eccremocarpus scaber Chilean glory vine may be an annual or a perennial with you depending on how the winters are. Dactylicapnos macrocapnos (used to be Dicentra) is another climber that has soft foliage.
Maybe perennial sweetpeas are another idea.

 

Agastache grows tall and flimsy, though I never had a problem with it falling over even without staking, looks pretty and attracts bees like crazy.