How to Propagate Leptospermum scoparium by Cuttings and How to Fertilize It
Leptospermum scoparium is relatively uncommon in everyday life, so many people are unfamiliar with it. Leptospermum scoparium is a shrub introduced to China from abroad. Its flowers look somewhat similar to plum blossoms but are smaller and more delicate, while its leaves closely resemble pine needles, hence the name Leptospermum scoparium. So do you know how to propagate and care for Leptospermum scoparium? Let's find out together below!
How to Propagate Leptospermum scoparium by Cuttings
1. Timing of cuttings for Leptospermum scoparium
The main propagation method for Leptospermum scoparium is cutting propagation, which is mainly carried out in spring, as this is a suitable time for the branches to take root and sprout; autumn cuttings are also possible.
2. Cutting method
Insert the cutting to a depth of one-third to one-half of the cutting's length, then water thoroughly once after planting.
Be careful to maintain appropriate temperature and humidity, and provide proper shading. Roots will form in about 35—45 days, and the survival rate of cuttings can reach 75%. The steps for autumn cuttings are the same as for spring cuttings, but the survival rate of autumn cuttings can reach 65%.
During the cutting period, pay attention to weeding, and fertilize as little as possible with dilute liquid fertilizer.
Once the cutting seedlings reach a height of more than 10 cm with more than 3 branches, they can be transplanted into pots.
How to Fertilize Leptospermum scoparium
Leptospermum scoparium has a fairly high demand for fertilizer, so the fertilizing frequency is relatively high. We need to fertilize once every two months or even once a month. Besides fertilizing on schedule, we should also remember to fertilize after each pruning of the branches. In addition, the soil should be kept moist at ordinary times. Apart from that, during the rainy season there must be no waterlogging, because waterlogging will affect its normal growth. Pay attention to drainage.
Notes on Growing Leptospermum scoparium in Winter
1. Winter temperature must not fall below minus 1 degree
Its cold resistance is not strong, and it cannot be grown outdoors in winter in the north, even with cold protection measures it cannot survive. In winter it must be above minus 1 degree for it to overwinter safely.
2. Sunlight exposure is indispensable
If it is grown outdoors in the south, there is no need to worry, but if it is grown indoors in the north, then choose a sunny spot to place it. Except in summer, it needs sufficient sunlight in all other periods to survive and grow better.
3. Do not let the soil become too wet or too dry in winter
Winter temperatures are already low, so water loss is greatly reduced. If you still water normally at this time, the soil will remain wet for a long time, which is very detrimental to Leptospermum scoparium. But this does not mean you can skip watering entirely; when it is too dry, diseases can also occur.
What to Do If Leptospermum scoparium Blooms Are Scattered
Scattered blooming in Leptospermum scoparium is mainly caused by untimely pruning. However, Leptospermum scoparium tolerates pruning well and has strong branching ability, so you can use this trait to start pruning from a young plant, prompting it to keep sprouting new branches and controlling a reasonable plant shape. After 1-2 years, you can achieve a beautiful plant shape with abundant blooms and dense branches covered in flowers.
Depending on the purpose of planting Leptospermum scoparium, there are differences in shaping and pruning.
If it is to provide cuttings, slips, or seeds for propagation, leave more long branches and prune less. After flowering, do not cut off the spent flowers but supplement with phosphorus and potassium fertilizer so that it can set seed.
If Leptospermum scoparium is grown for ornamental purposes, prune promptly and repeatedly to cultivate a highly ornamental plant shape, and after flowering prune and supplement fertilizer to achieve a second bloom.
Carry out a careful pruning once a year after flowering to achieve the goals of dwarfing the crown and maintaining a beautiful tree shape, and it can also prompt the plant to sprout new flowering branches.
Through the above content, I believe everyone has gained some understanding of Leptospermum scoparium growing techniques. Although Leptospermum scoparium is relatively uncommon in everyday life, it can be purchased at larger flower markets or online. If you like it, you can buy a potted Leptospermum scoparium to grow at home; it is also especially suitable as a decorative plant!