Thunbergia (BES) more than one year?

Hello. Wondering if Black Eyed Susan can be cut back, overwintered and encouraged to flower again.

Thanks

Neil

 

I wouldn't be at all surprised as long as you can provide steady temps of 55+ degrees all winter. Conservatory?

 

to Gardeners Corner Neil - Black-eyed Susan can be cut back to 2" from the ground after the first frost. In spring it will start to grow again from the ground.

 

Annie , Thunbergia is one of my favourite plants. I grow from seed every year , but never knew it could over winter outside ? I always thought it was a touch tender.

 

I have Cosmos that I grew this year from seed, I want to know is it possible to cut it back for next year ,or will it not survive the winter?

 

I always grow new from seed Liliana , in fact I am trying to collect Cosmos seeds for next year - but thats another post. There are lots of Cosmos growers on here , so I am sure they can advise if they could overwinter.

 

Depends what sort of Cosmos

The one most commonly grown from seed is a feathery leafed plant with large flat daisy-like flowers (commonly Pink or White) and is an Annual - it won't come back next year.

There is also a herbaceous Cosmos which will come back next year (but can be a bit tender, so may need protecting). Most likely you would have bought plants of this in 1L or larger pots. The Chocolate coloured one is probably the most well known.

 

I thought Black Eyed Susan was Rudbeckia? Rudbeckia can be Annual, Biennial or Perennial, but the Black Eyed Susan varieties are Biennial as far as I know.

Thunbergia is, as far as I know, a climber. It to can be annual or perennial ... so not clear from just its "surname"

Sorry, not much help I don't suppose :(

 

Its Thunbergia Alata , the climber , I grow Kristen. Now Rudbeckia, as you say , is known as BES as well , this may be what Enncee and Annie are discussing?

 

The one thing I do know: ... its blinking confusing !

Latin names solves that problem ...

Thunbergia alata ... now I get it. They have flowers that look like ... Rudbekia !!

Climbers though, as other Thunbergias, but T. alata is an annual, as far as I know. I don't grow it here as, being as how flat Suffolk is, its probably a bit exposed, and it would do better in a conservatory ... but given a conservatory I guess I would want to grow some things that were more "specialist".

I was tempted by some seeds on Small Wonderful Things today. I had a look to see what past auctions have closed at - £30 - £80 seemed common-place ... for a packet of half a dozen seeds. Now that would be classes as "a bit more specialist" I suppose!

 

Yes, it's Thunbergia Alata:

http://www.bbc.co.uk/gardening/plants/plant_finder/plant_pages/915.shtml

Thanks all.

 

I agree with you Harry they are touch tender - best treated as an annual as the new plants are always better than the saved thunbergia plants. However if grown in a pot they do need to be overwintered indoors. A friend grew them up a trellis and did cut them back, covered them overwinter and they regrew in the spring. It obviously depends on areas and where they are sited.