Winter Flowering Heather (Thạch Thảo)
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It's time to be thinking about your winter garden! What can you use that will provide color and interest during the cloudy dark days of winter? I think the perfect solution is heather! The beauty of winter flowering heather is that they not only flower at that time of year, but most flower for several months.
During the cool, dark days of late fall and early winter, the garden often tends to looks a bit drab. Winter flowering heather can be counted on to change this situation in a very colorful way. The wide color range of this fascinating plant family includes shades of pink, rose to red, light purple, lilac, lavender and orchid.
USES IN THE LANDSCAPE
Winter heathers offer quite a bit of versatility too, because they grow in either spreading or upright forms. The lower, spreading types are grown as ground covers, in rockeries, containers or for spot color in flower and shrub beds. While the upright varieties are best suited for borders, spot color, massing or as container plants. The flowers of both types are ideal for small winter arrangements.
TIME TO SELECT PLANTS
Because color varies by variety, it's best to select them when they are in bloom. Then you can determine the flower color and select them for the desired growth habit. Heathers are often available in a range of plant sizes. Many garden outlets feature small plants in four inch pots, as well as larger ones in one and two gallon containers. Some varieties of winter heather will begin flowering now, while other do not start blooming until January or later, so you may want to select ones that flower at different times during the fall and winter. Since they start flowering now, this is generally when you will find the best selection of plants.
PLANTING TIPS
What I like about heather is that they are easy to grow, providing you observe a few cultural requirements. First, they must be planted so the root-ball is level with the soil surface. They will not tolerate being planted too deeply. Second, be careful not to pile mulch up over the root system. In fact, it is best not to mulch them at all. Third, heather must be planted in soil that is well drained, they will not tolerate continual wet feet.
They can be planted anytime the ground is not frozen. As you prepare the soil for planting, mix peat moss, compost or processed manure with your existing soil. The addition of a little non-burning fertilizer, mixed into the planting soil, will encourage new root growth. Then be sure to set the plant at ground level. Firm the soil around the plant and water-in.
HEATHER NEED PRUNING
In order to keep heather looking really nice, the plants should be pruned each year immediately after they have finished flowering. For the winter flowering varieties that generally means pruning in late April to mid-May. Prune or shear just below the old spent flowers. Pruning is essential if you want to keep the plants bushy and compact, otherwise they tend to open-up in the center and look rather ragged. The biggest advantage in pruning is that it will result in additional flowers the following year.
FERTILIZING
My experience is that heathers do not need a lot of fertilizer. If the soil is prepared properly to begin and the plants are kept groomed and provided good drainage they seldom require feeding. Poor foliage color, or stunted growth would indicate the need for feeding. So if either occur, feed heather with a rhododendron type fertilizer. The best time to feed them is in late winter or late spring. Apply the fertilizer at the drip-line of the plant, then water-in thoroughly.
TRANSPLANTING ESTABLISHED PLANTS
Heathers have a compact, fibrous root system, so small to average sized plants are quite easy to move. Large, old well-established plants are more of challenge to move. If a plant needs to be moved the best time is during the winter dormant season months of November through March.
STARTING NEW PLANTS
Heather can be started from cuttings or by layering outer branches in the soil. Cuttings are taken from new, mature tip growth. Take only two inches of the tip growth, dip the cut-end in a rooting hormone and start in a media of 50% sand and 50% peat moss. Cuttings are best taken in July and August.
The method used to layer outer branches, is to simply scrape the lower stem of an outer branch, rub a little rooting hormone on the cut, and bury that part of the branch in soil. It should root in 3 to 6 months.
SOME OLD FAVORITES
Mediterranean Hybrids (lilac-pink/white) - two popular varieties. Darleyensis flowers with lilac-pink flowers, and Alba, with white flowers. What I like about these two is that they flower from about early October to early May, when not much is in flower. My wife likes to use the short stemmed flowers in winter arrangements. Eventual growing height is about eighteen inches with a spreading growth habit. My plant is about 5 feet across.
Springwood White and Springwood Pink (pink/white) - these are two excellent ground cover types. As the names imply, one is pink flowering the other white. They only grow about six to eight inches high, but eventually spread several feet in width. They flower January to mid-April.
Vivellii - this another of my favorites because of its dark green, tinged bronze-red foliage color, and deep carmine-red flowers. A compact, slow growing plant, to about eight to ten inches in height. Flowering season is January to April.
King George (rosy-crimson) - another old-timer with a nice compact growth habit. November to late February flowers are rosy-crimson. Growing height is about one foot high.
Ruby Glow (ruby-red) - ruby-red flowers from January through April. Low spreading growth habit, compact to about eight inches in height.
Needless to say, these are only a few of the winter flowering varieties, so be sure to check with your local garden outlet, to see which ones are available. In addition, you may want to take a good look at some of the newer varieties, so you can evaluate their many attributes.
For a bright spot of color in the winter garden it's hard-to-beat the winter flowering heathers.
Source: Ed Hume Seeds
Re: Winter Flowering Heather (Thạch Thảo)
WINTER BLOOMERS
Right now the garden is particularly splendid even though none of the spring bulbs are blooming yet. The color is provided by:
Erica x darleyensis 'Kramer's Red' (magenta), with magneta flowers and bronze-green foliage, (blooming November through March)
Erica x darleyensis 'Darley Dale' (shell-pink), with shell-pink flowers and foliage cream-tipped in spring (blooming November through April)
Erica x darleyensis 'Furzey' (lilac pink), with lilac pink flowers and dark-green foliage with pink tips in spring (blooming December through May)
Erica carnea 'March Seedling' (pink), with pink flowers and mid-green foliage (blooming January through May)
Erica carnea 'Myretoun Ruby' (pink->crimson), with pink flowers that darken to crimson as they age (blooming January through April)
Erica carnea 'Bright Jewel' (pink), with pink flowers and mid-green foliage (blooming February through May)
These will continue to provide mounds of bright color right into the rhododendron's blooming season, considerably brightening up spring as well as winter. In a month or so, they'll also provide a memorable backdrop for daffodils and other spring bulbs.
SUMMER BLOOMERS
My bed is designed so that the bloom seasons of the heathers overlap; the continuous color ensures that our front bed is always eye-appealing.
Daboecia x scotia 'Tabramhill' (dark crimson) is one of my favorite season-spanners; it has dark crimson flowers and dark green foliage, a dwarf habit, and blooms from May through December.
Source: Heather: A Plant for all Seasons
Re: Winter Flowering Heather (Thạch Thảo)
Hoa thạch thảo thường hay được thấy nở hoa màu tím hoặc đỏ, nhưng cũng có loại nở hoa màu trắng rất đẹp. Còn loại nở hoa màu hồng ở xa nhìn đẹp nhưng lại gần nhìn không được đẹp lắm.
Re: Winter Flowering Heather (Thạch Thảo)
Re: Winter Flowering Heather (Thạch Thảo)
Website này có hầu hết tất cả những loại thạch thảo: Heathers Database
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