Nation of Gardeners results: Eryngium Supernova Starlight

Eryngium 'Super Nova Starlight' - RHS Chelsea Flower Show 2011Eryngium Supernova Starlight is a distinctive and easily recognisable plant that adds height to the back of your flower borders.

Our Nation of Gardeners were asked to plant a bare root variety of Eryngium Supernova Starlight in November 2013 to test raising these bare root perennials in exposed and sheltered situations over winter.  They were sent two plants – one for planting in the open ground and one for planting in a pot and protecting in a coldframe or greenhouse. Results seen via each of these methods will be compared in Spring and Summer 2014.  The table below charts their progress.

Location Elevation Date planted Date first signs of growth Notes
Cheshire 49m 12 November 30 November 2cm growth as at 30/11/13 in both plants
Renfrewshire 28m 9 November 15 November (potted in coldframe plant) 20 November: The plant seems happier in pot in cold frame than in open ground.
North Devon 30-50m 8 and 9 November 20 November Planted in pot on 8 November and in ground on 9 November.  20 November observation: the plants outside are looking stronger than those protected in pots.
Worcestershire 55m 10 November Planted both on same date. 17 November: Covered ground planted perennials with umbrella cloche due to severe weather warning.
Derbyshire 39m 10 November
Cumbria 90m 8 November Planted both on same date.
Ceredigion 131m 8 November Planted both on same date. In the open ground planted into partial sunny position. In pot, planted into sunny position.
Bristol 55m 9 and 11 November One planted into coldframe on 9 November and one into ground on 11 November
Suffolk 6m 9 November Planted one into coldframe and one into garden.
Hertfordshire 150m 23 November
Surrey 58m
Pontypridd 157m 10 November
Buckinghamshire 66m 10 November
Guildford 56m
Gloucestershire 74m 5 November 15 November
Derbyshire 241m 9 November early December in coldframe One planted in pot and put into coldframe with slug protection. One planted in open ground with slug protection.  Some new leaf growth on coldframe plant by early December. 20 December: both plants discovered to be eaten. No trace left.

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