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Do rudbeckias cross polinate?

Big Blue SkyBig Blue Sky Posts: 659
My latest garden additions are three varieties of Rudbeckia: prairie sun, prairie glow and chirokee sunset. 
I understand they are annuals (well, everything seems to be annual in my garden 🙄 ) but apparently they self seed. So I was wondering if they will each produce true seeds or will they cross pollinate. My garden is very small so they will be close enough for a bee to visit them all within five minutes. 
Also, if you have any experience with these three varieties please can you share your experience of hot to keep them happy. Thank you 😊 
Surrey

Posts

  • ObelixxObelixx Vendée, Western FrancePosts: 27,562
    Most rudbeckias are either biennials or short lived perennials but don't like winter wet or cold so are grown as annuals.   In my experience they also make good slug and snail fodder.

    They need full sun and a moist but well drained soil.  If your garden is exposed the taller ones will benefit from some staking.   I wouldn't worry about cross pollinating.  It may lead to some interesting variations.   
    "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
  • Big Blue SkyBig Blue Sky Posts: 659
    Thank you @Obelixx Looks like they will be safer in pots here - loads of slugs and very dry here 😣
    Surrey
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