Hollyhocks (Alcea)

Horticulture News Forums Perennials Hollyhocks (Alcea)

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  • #11845
    Newspaper
    Keymaster

    How many types of hollyhocks are there?

    Alcea is a genus of about 60 species of flowering plants in the mallow family Malvaceae, commonly known as the hollyhocks. They are native to Asia and Europe

    • This topic was modified 1 year, 7 months ago by Newspaper.
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    • This topic was modified 1 year, 4 months ago by Newspaper.
    • This topic was modified 1 year, 4 months ago by Newspaper.
    • This topic was modified 7 months, 1 week ago by Newspaper.
    • This topic was modified 7 months, 1 week ago by Newspaper.
    • This topic was modified 7 months, 1 week ago by Newspaper.
    #13011
    Leslie
    Participant

    What are good companion plant for Hollyhocks?

    Dahlias, clematis, shrub roses, black eyed susan, phlox, climbing roses

    #13012
    Leslie
    Participant

    Where can I grow Hollyhocks?

    Hollyhocks grow in most soils including heavy clay soils. Hollyhocks tolerate dry soils. They don’t like shade or windy spots.

    #13013
    Leslie
    Participant

    Is Hollyhock a perennial or an annual?

    Hollyhock is a short-lived perennial  but can live for several years if stalks are cut off at the base after flowering.

    #13018
    Newspaper
    Keymaster

    Are Hollyhocks frost hardy in the UK?

    Yes, they will survive most winters in the UK.

    #13019
    Newspaper
    Keymaster

    When do Hollyhocks flower?

    Hollyhocks flower in mid to late summer

    #13022
    Newspaper
    Keymaster

    How to cure Hollyhock rust?

    Hollyhock Rust is caused by the Puccinia malvacearum fungus. It is little orangish-brown colored flecks that cover the underside of plant leaves. The tops of leaves will develop yellow spots. It is caused by damp humid conditions. Make sure that your plants have a good air flow around them by not planting them too dense. To control by chemicals, the fungicides tebuconazole (Provanto Fungus Fighter Concentrate), tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect), and triticonazole (Fungus Clear Ultra) are officially approved for the control of rust diseases. Alternatively you can try to control the disease manually by removing diseased leaves and not planting other plants from the same plant family nearby for example Abutilon, Hibiscus, Lavatera, Malva etc. Do not use the seed from infected plants

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