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Dianthus allwoodii & caryophylisCommon name; Border Carnation & Florists Carnation Dianthus; includes carnations, pinks and sweet william. Most forms are of hybrid origin, and are generally grown as annuals / biennials or perennials, in herbaceous borders or beds. Many varieties make good 'cut flowers' and are useful plants for containerized gardens. Similarly; some dwarf species are ideal for rock gardens and dry walls. The perpetual-flowering carnations varieties are tender perennials and require greenhouse cultivation. Most species tend to be short -lived, necessitating the need for frequent propagation. The plants should be grown in soil that is not too acid. They are tolerant of salt spray making them a useful subject in coastal areas. Dianthus x allwoodii the Border Carnation is a perennial that flowers in early to late summer. It is semi-deciduous, and the fragrant flowers range from white through pink to dark red. They make good 'cut flowers' and is a useful plant for containerized gardens. They perform best when grown in alkaline soil and in full sun. Depending upon variety they grow from around 100mm -500mm (4"-18") high and can spread to around 500mm (18") caryophyllus - Florists Carnationcan be treated as a border carnation but due to its 'floppy' growing habit it generally requires support to display it at its best. For this reason it is more commonly grown as a container plant under cover. It is an evergreen perennial that produces self coloured or bi-coloured flowers in early to late summer. The sometimes fragrant flowers range from white through pink to dark red, or combinations of these colours. Depending upon variety they grow from around 200mm -500mm (8"-18") high and can spread to around 200-300mm (8"-12") Because they are often grown under cover, they are susceptible to attacks from a number of the problems associated with indoor growing, e.g. Aphids, Spider mite and mildews.
Cultural notes; Week 7; Sow seeds thinly in pots/ trays of seed compost and maintain a temperature of 16°-20°C (61°-68°F). After germination, which should take around for to five days, reduce the temperature to 10°-12°C (50°-54°F). Week 9; Prick out when large enough to handle into trays / boxes of potting compost. Week 13; Harden off in a cold frame till planting out time. Week 17; Take piping cuttings if there are any available. Week 21; Plant out in a well drained sunny situation in soil that has been lightly manured. Too rich soil can encourage leaf growth at the expense of flowers. Pot up rooted piping cuttings. Week 25; Support plants by inserting three split canes and encircle each plant with string or raffia. Alternatively use purpose made wire rings. circa Week 26; For quality flowers disbud any side shoots, retaining only the crown bud on main stems. Do not apply fertilisers to border carnations after flowering. Feeding may encourage an inferior second crop of flower stems in autumn. Week 27; Layer plants to increase stock. Week 30; Increase border carnations by taking piping cuttings or layering. Week 36; Check layers, and if rooted sever from the parent plants. Three or four weeks later, lift the rooted the plantlets and place in flowering quarters. Support the plantlets by tying into a split cane until they become established. Week 39; Tidy up / prune established plants before the onset of winter. Border carnations are perennial and are generally grown for their fragrant cut flower properties. They come in a variety of self and bi-coloured varieties as can be seen here; Carnations should be planted out in full sun 300-500mm (12”-18”) apart in a well-drained, light sandy soil. The crown, or top of the root structure, must be level with the surface of the soil, never bury any part of the stem. The plants should not be mulched, their tender root tops and trailing stems require good air circulation at all times and must be kept as free from moisture as possible Alternatively use purpose made wire rings.
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