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Stunning, ornamental, vivid midnight-blue flower heads are produced on tall, upright, branched stems repeatedly from August to September. This is a handsome globe thistle with a clump-forming growth habit and deeply-lobed, thistle-like, glossy dark green leaves which are spine-tipped at the edges and have cobweb-like markings on top.
The golf ball-sized flowers are excellent for cutting and it makes a great choice for growing in the middle of a sunny, well-drained border. If the flowering stems are cut back after the first lot of flowers fade, it will produce a second flush of blooms in early autumn.
Buying Perennials from Jacksons Nurseries
At Jacksons Nurseries we lightly trim back our perennials after flowering to ensure that the plants remain neat and tidy whilst in the pot. The more tender the plant the less we cut back to help protect exposed stems from winter frost. Depending on the plant variety we will then prune back further in spring once the risk of the more severe frosts is over.
As a result, depending on the time of year you buy perennials, they may not look like images showing their ‘prime time’ in flower and looking at their best.
From late autumn onwards and dependant on variety, there may be very little visible above the soil except for a few cut back dormant leaves or stems. It is perfectly normal for dormant plants to look like this from autumn onwards, they will however burst back into life in spring.
Ours standard delivery starts at £7.99 for orders £20.00 and over, for orders between £10.00 & £19.99 delivery is £9.99 and orders under £10.00 are charged at £11.99. Delivery for larger items or high volume orders requiring a pallet start at £40.00 the exact cost will be caluclated at check out.
Orders are usually dispatched 7-10 working days following receipt of your order. In many cases we dispatch sooner than this although during busy periods or when an item or items on your order are out of stock and we are ordering them from a supplier then please allow up to 30 days.
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Perennials are described and classified differently by different gardeners but all would agree that they are plants that come into flower every year from early spring to late summer, the exact time dependent on variety and most die back to ground level in autumn and winter.
As for all plants, soil preparation is time well spent. Dig over the area to be planted ensuring that the ground is free draining. If not then you may wish to either consider planting in a different spot or raising the level of the planting area by adding additional topsoil, well rotted garden compost and/or well rotted manure. Add ‘Fish, Blood and Bone’ fertiliser or a high potash fertiliser to encourage good root growth and development.
It’s always a good idea to plant a few of the same plant together, we recommend planting in 3’s or 5’s to provide a bold effect but allowing them plenty of room to develop.
Always check eventual plant heights when planning borders to ensure that the taller plants are at the back (or at the centre of an island bed) followed by the medium and then smaller low growing plants.
Remember to deadhead perennials after flowering, trim back lightly in autumn as required to tidy the border and if necessary trim again in spring once the risk of heavy frost has passed.
If perennials get too big, start to flower less and less or if it seems to be dying off from the centre, consider dividing the plant but always check that the particular variety is happy to be divided and that you divide at the right time of year for the plant.
By using this simple guide and a little time, perennials can make an absolutely spectacular difference to your garden.