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Window box gardening

Window box Plant lists and ideas

EUROPEAN FLOWER LIST : NORTH AMERICAN FLOWERLIST

Forced indoor bulbs

Once these have flowered don't throw them out. Cut off the heads (unless you want seed) then put them somewhere that the leaves can get the sun. This will feed the bulb for the next year. Once the leaves have died you can plant the bulbs outside and they will flower at the normal (unforced) time next year.

The narcissus Tete-a-tete is particularly good, and provides early colour and a delicate fragrance too.

Below I have listed groups of plants. I have tried to include at least four plants in each list as you may not be able to find all of them, although, unless you have a very large windowbox, I would recommend that you have just three in each box.

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Plants

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Thyme Thymus praecox, wild thyme
Thymus pulegioides
Thymus leucotrichus
Thymus citriodorus
Thymes make a very fragrant, easy to care for windowbox, and an excellent choice for windy sites. The flower colour will be pinky/purple, and you can eat the leaves if your air is not too polluted. Try to get one variegated thyme to add a little colour when there are no flowers.
Herb Sage, mint, chives, thyme, rosemary, lemon balm, tarragon, summer savory Get the plants from the herb section of the supermarket, so you can eat the leaves. Do not include basil as it needs greater fertility than the others, however it can be included if you put it in a pot in the windowbox and give it more fertile compost or feed it more often. Pot the rosemary up separately if it grows too large.
Mints Mentha longifolia, horse mint
Mentha spicata, spear mint
Mentha pulgium, pennyroyal
Mentha piperita, peppermint
Mentha suaveolens, apple mint
Mints are fairly fast growers, so you could start this box with seed. They are thugs, though, and will very soon be fighting for space. So you will either have to thin and cut back or else you will end up with one species - the strongest. The very best mint tea I ever had was in Marrakesh. A glass full of fresh mint was placed in front of me, and boiling water was poured into it. Then I was given a cube of sugar to hold between my teeth while I sipped the tea. Plant this box and you can have mint tea for months.
Heather Too many to list For year-round colour try to plant varieties that flower at different times of year. Heather requires acid soils, so fertilise with an ericaceous fertiliser, and plant in ericaceous compost. Cut back after flowering and remove the cuttings. It is best to buy plants as heather is slow growing.
Blue Ajuga reptans, bugle
Endymion non-scriptus, bluebell
Myosotis spp., forget-me-not
Pentaglottis sempervirens, alkanet
This will give you flowers from March till July. The bluebells should be bought as bulbs, as seed will take a few years to flower. The others can be started from seed.
Yellow Anthyllis vulneraria, kidney vetch
Geum urbanum, wood avens
Lathryus pratensis, meadow vetchling
Linaria vulgaris, toadflax
Lotus corniculatus, birdsfoot trefoil
Primula vulgaris, primrose
Ranunculus acris, meadow buttercup
Ranunculus ficaria, lesser celandine
These will give you flowers from May to October, and if you include the primrose, from February. Try to include a vetch as they can climb or trail so occupy the space that other plants can't. All can be grown from seed.
White Trifolium repens, white clover
Bellis perennis, daisy
Digitalis purpurea alba, white foxglove
Alyssum maritimum

Redsea odorata, mignonette
All can be grown from seed. The clover and daisy will have to be cut back as they will take over. The clover roots add nitrogen to the soil. The mignonette flower doesn't look very special, but the fragrance is wonderful, and the alyssum smells of honey.
Pink Lychnis flos-cucli, ragged robin
Scabiosa columbaria, small scabious
Symphytum officinale, comfrey
The comfrey will try to take over. Its leaves make an excellent fertiliser, and are very good on the compost heap, though windowbox gardeners rarely have one.
Fragrant Lonicera spp., honeysuckle
Alyssum maritimum
Redsea odorata, mignonette
Lathyrus odoratus, sweet pea
The sweet pea will need twine or something to climb up, so is suitable if you have sliding windows or window that open inwards. You will be rewarded by a fragrant curtain every time you open your window.
Spring bulbs and late wildflowers Galanthus nivalis, snowdrop
Narcissus pseudonarcissus, narcissius
Crocus purpureus, crocus
Cyclamen spp.
The idea of this box is to maximize your space. The bulbs (cyclamen has a corm) will flower and do their stuff early in the year. After flowering cut the heads off as you don't want them making seed, but leave the leaves as they fatten up the bulbs to store energy for next year. The foliage of the wildflowers will hide the bulb leaves to some extent. Then the wildflowers take over and flower till autumn
Aster spp., Michaelmas daisy
Linaria vulgaris, toadflax
Lonicera spp., honeysuckle
Succisa pratensis, devil's bit scabious
Mentha pulgium, pennyroyal
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