Trillium grandiflorum ‘Flore Pleno’

6 May

Trillium grandiflorum 'Flore Pleno' flower (22/04/2011, Kew Gardens, London)

Trillium grandiflorum ‘Flore Pleno’ flower (22/04/2011, Kew Gardens, London)

Position: Full sun to full shade

Soil: Moist, well drained

Flowering period: Late spring

Eventual Height: 40cm

Eventual Spread: 30cm

Hardiness: 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b

Family: Melanthiaceae

Trillium grandiflorum ‘Flore Pleno’ is a perennial with a clump forming habit. It has almost stalk-less ovate to rounded, dark green leaves(although all of the above ground foliage being modified bracts with the true leaves being found as a protective papery layer over the rhizomes) that are up to 30cm long. It bears pure white double flowers which are produced above a whorl of three leaves being cupped at first then opening widely with broadly ovate, slightly wavy petals.

The species Trillium grandiflorum, commonly known as the Wake Robin, is native to eastern North America It is unusual in that ants that will carry the seeds back to their nesting sites, aiding its dispersing. It is also used to measure grazing levels of deer, as they will eat the largest plants available so that the size of the plants is an excellent measure of how many deer are grazing in an area.

The etymological root of the binomial name Trillium is derived from the Latin triplum meaning ‘triple’, referring to the three-parted flowers common to the genus. Grandiflorum is from the Latin grandis meaning ‘large’ and flora ‘the goddess of flowers’. ‘Flore Pleno’ alluding to the double flowers as pleno means ‘full’ in Spanish.

Trillium grandiflorum 'Flore Pleno' (22/04/2011, Kew Gardens, London)

Trillium grandiflorum ‘Flore Pleno’ (22/04/2011, Kew Gardens, London)

Trillium grandiflorum ‘Flore Pleno’ is useful to the landscape architect as ground cover particularly in shady locations, requiring no direct sunlight. It will however require space, as it will not flower until it reaches an adequate size, for both leaf area and root volume. It is also useful for soil stabilisation on slopes, as its roots will aid in erosion control.

Trillium grandiflorum ‘Flore Pleno’ will tolerate a wide pH range so long as the soil is free draining. It requires consistently moist soil and should not be allowed to dry out during droughts.

Ecologically, Trillium grandiflorum ‘Flore Pleno’ will attract pollinating insects such as bees which feed on its nectar, although it is rarely frequented by them (this led to it once being thought of as self pollinating). It attracts ants as the elaiosome of the seed will evoke their corpse-carrying behavior, their seeds are also spread by wasps (Vespula vulgaris) and Harvestmen (members of the Arachnid family with a near global range). Trillium grandiflorum is also a preferred browsing plant for deer.

The Royal Horticultural Society have given the species Trillium grandiflorum their prestigious Award of Garden Merit in 1993.

Trillium grandiflorum ‘Flore Pleno’ requires little to no care. Large clumps may be divided after flowering.


2 Responses to “Trillium grandiflorum ‘Flore Pleno’”

  1. Mr.W.Endicott 04/12/2011 at 19:08 #

    can i have a price list for all the plants in the Trilium range that you sell thank you tigercub33

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