Bidens aurea ‘Hannay’s Lemon Drop’ – one year on

003Ever since I posted about this unusual Bidens almost exactly a year ago, I have noticed that it keeps showing up in the ‘top posts & pages’ so readers are obviously interested in it and how it performs. I thought it was late to flower last year because I had grown it from seed in March and it was going to need several months to attain it’s height and maturity. When it did flower it was stunning in it’s simplicity. Dainty and delicate white tipped canary yellow flowers on tall wiry stems. Frankly, when it died away last winter I didn’t expect it to re-appear, and so I was delighted when it did. Bidens is not generally considered to be hardy but this variety is reckoned to be hardier than most.

Bidens aurea 21 May

Bidens aurea 21 May

It was probably due to the very cold and wet spring this year but it took forever to appear and it was the end of May before I noticed any new growth. However, I was delighted to see far more growth than just the three plants from 2012. It had spread several feet and now covered an area 1 metre across. This fresh young growth sat reluctantly through spring and didn’t do very much until the end of July when it suddenly took off and the first flowers finally appeared at the end of August, exactly the same as last year!009

If anything, I think it might be slightly shorter this year which may be due to the horrible clay soil it sits in and the corresponding lack of nutrients but the foliage colour is a good dark green and it looks very healthy. The flowers, three or four at the top of each stem, open successively and seem to last a week or so before the next bud opens. Bidens aurea 'Hannays Lemon Drop 2'

If it spreads again next year I may have to re-classify it as invasive because, as much as I like it, I don’t want it to take over the border. It is already swamping a few things so a bit of division is called for next year. A number of visitors from our horticultural society have asked for a piece so it will end up in several more gardens.

A plant I can heartily recommend. If only it was scented!

2 thoughts on “Bidens aurea ‘Hannay’s Lemon Drop’ – one year on

  1. Highly invasive! And very persistent. The roots run in amongst everything else in the border, and it regenerates from the smallest piece. I made the mistake of planting it in two customers’ gardens as well as my own 3 years ago, and still haven’t managed to get rid of it. Pretty as it is it’s a menace.

    • Hi Alex and thanks for your comment. I agree it runs a bit but I don’t agree that it’s highly invasive. It is nothing like ground elder!. I have a bigger problem with the white sterile form of willowherb which runs for miles! I have found that this Bidens loses vigour after a few years and is now shorter and less floriferous so, who knows, it might just give up!

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