Dahlia 'Blue Boy'

decorative dahlia tuber

4 5 1 star 1 star 1 star 1 star 1 star (5 reviews) Write review
1 tuber £3.99
in stock
3 tubers £11.97 £9.99
in stock
Quantity 1 Plus Minus
Buy Dahlia 'Blue Boy' decorative dahlia tuber: Great for cutting

  • Position: full sun
  • Soil: fertile, humus-rich soil
  • Rate of growth: average
  • Flowering period: July to September
  • Hardiness: half hardy (may need winter protection)

    Well-formed lilac-pink flowers provide colour in the border for many months from midsummer. For an outstanding display mix it with most shades of pink or purple, as well as silvers and blues.

  • Garden care: Dahlia tubers can be planted outside after frost, or started off in pots under glass in late winter to early spring. Plant them horizontally approximately 12cm deep, making sure the ‘eyes’ are uppermost. Allow enough room between each tuber so the plants can grow and spread to their full size without being over-crowded. While in growth, provide a high-nitrogen liquid feed each week in June, then a high-potash fertiliser each week from July to September. Stake with canes or brushwood if it becomes necessary. In mild areas, leave them in situ over winter, but protect the crown with a generous layer of dry mulch. In colder areas, carefully lift and clean the tubers once the first frosts have blackened the foliage and allow them to dry naturally indoors. Then place the dry tubers in a shallow tray, just covered with slightly moist potting compost, sand or vermiculite and store in a frost-free place until planting out again.

  • CAUTION do not eat ornamental bulbs
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Eventual height & spread

My favourite dahlia. Masses of flowers that stay upright.

5

I failed to lift the tubers after the last frost but mulched it generously and am now waiting for green shoots to appear! Not a great fan of cut flowers indoors as prefer to see them in my garden. However, residents of a local care home just love them - and no earwigs to upset their enjoyment.

Moira bus

Cambridge

true

Beautiful

5

Beautiful flowers.Turned out just like the picture on the sitel. Flower heads were big and abundant so lots for my vases. Easy to grow too.

JP

Scotland

true

No needit's a perennial

3

Due to ground conditions (nearby conifer) I planted in large pots or as far away from roots as I could but the plants were weak due also to pm only sunlight. This year I'm planting in a more favourably sited bed provided they have survived the winter.

Ian

Frimley Surrey

true

A blue beast of a dahlia!

5

This is the dahlia that dominated my boarders, it grew to a good 5-6ft in height and was never not crowned with amazing blue/purple blooms. There stems werent the longest but they last ages in a vase, it also produced so many main stems it was excellent to propagate from.

dahlia ben

newcastle under lyme

true

Nice pale blue

4

Nice soft blue Blend well with other flowers.

R

Lincolnshire

true

2000025530

4.4 5

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