If you want to place some hand-tied, dense bush plants in the yard to hinder invaders, or as ornamental landscape plants, then these highly decorative bushes below are very suitable.

Above is a wall of flowers arranged with hydrangeas
When arranging garden plants, if you want to develop a fence-like form, you need careful arrangement, and you need proper pruning in the early stage, and it is best to set up a bracket in advance to make these plants grow more evenly.
Next you will see some very defensive plants that can prevent bear children, can flower, and can also breed small fruits.
1. Agave
Above is the cetacean agave
Agaves can be cultivated both potted and landscape plants, in the far south, where there is no frost all year round, they can be exposed outdoors all year round, they can live for tens or hundreds of years, sometimes called "plants of the century" or "sentinel plants", its leaf tips are sharp spikes, be careful when maintaining, it is a very strong succulent.
Above is Phnom Penh Agave
Agaves are particularly suitable for keeping in well-lit environments, and the soil is well drained, and if these agaves can be planted in a straight line, they can easily become a barrier.
Of course, it should be noted that there are many varieties of agave, some plants are short, some plants are tall, and the color and morphology of the leaves are different. If you want to lay out a relatively high barrier, you can use Phnom Penh Agave. If you want to arrange a relatively small fence, you can use cetelian agave.
2. Yellow reed wood
Yellow reed wood is more suitable for breeding in the northeast and northwest regions, it has a lot of varieties, there are different varieties of evergreen and deciduous shrubs, it is slightly shade-tolerant, drought tolerance and hardiness are relatively strong, in a variety of soils can grow well, need to ensure that the soil has good drainage capacity, it can grow well in various climatic conditions, and do not need to take care of much.
Yellow oak is a very ornamental plant, and its charming leaves change color in autumn. One thing to understand is that not all varieties of yellow reed have spikes on their branches.
Some of the yellow oak varieties have now become very popular landscape plants, even as green plants, they are very suitable for arranging next to the yard, arranged in the form of a fence.
The maintenance of yellow reed wood requires regular pruning, in autumn and winter, these yellow reed trees can produce yellow flowers, and then they will give birth to red and dark blue fruits.
3. Golden Amber Cactus Ball
Golden amber is a very interesting and defensive ornamental plant, it can grow to more than a meter high, if your home is in some perennial warm and dry locations, in the soil drainage is particularly good, you can plant some golden amber cacti, their shape is spherical, the whole sphere is covered with golden spikes, like a cylinder, in the sun and warm dry environment, the top of the sphere can even bloom some yellow flowers.
The golden amber cactus originally grew in the Mexican region, its growth rate is relatively slow, in the desert climate, it grows particularly well, it can withstand a short frost, but if the temperature is too low, it is also easy to cause sphere frostbite.
4. Blackspin Lee
Blackspinn plums can produce small dark purple or black berries in autumn, which can be made into fruit wine, which is particularly sour in taste but contains a lot of sugar.
It is also relatively simple to maintain the black thorn plum, they are deciduous shrubs, the branches are particularly dense, and there are spikes on the branches, if you want to pass through a black plant is almost impossible.
The form of the black thorn plum into the fence is very suitable, it can grow well in some perennial cool and dry environment, the winter needs the appropriate low temperature, these black thorn plums are extremely hardy (northeast and northwest can be raised), winter do not have to fear of frostbite, in winter after its leaves fall out, the plant will become bare. If it is found to have some white flowers, it indicates that spring is coming.
Planting black thorn plum is particularly simple, it can adapt to a variety of soils, especially tolerant to salinity, as long as the plant grows strong, it does not need much care, only need to occasionally water during long-term drought.
5. BlackBerry
The black plum mentioned here is a thorny shrub, which belongs to the genus Of The Hook, which can maintain growth for many years and can breed some edible red or black small berries in summer and autumn.
The blackberry is a rough-looking shrub with many spikes on its branches, and its branches are particularly thick, and in some rural areas, it will be arranged in the shape of a fence.
To maintain these thorny blackberry shrubs, be sure to pay attention to regular pruning. However, it should be noted that these thorny blackberries will wither after bearing fruit and will grow back in the coming year, and blackberries are not too ornamental landscape plants, but they are very suitable for arranging fences.
Of course, the blackberry fruits we eat on the market now are some newly cultivated thornless varieties, which still need to be understood.
6. Bougainvillea
This plant is familiar to many people, the bougainvillea is particularly ornamental, belongs to the vine shrub flower, in the tropics can basically bloom bright flowers all year round.
Now many people also raise the bougainvillea into a potted plant, careful observation, you will find that the branches of the bougainvillea are a lot of hard thorns, especially those older branches, and the young branches do not have hard thorns, its flowers are on the young branches.
The climbing ability of the bougainvillea is particularly strong, suitable for raising in a sunny, warm, slightly dry environment, no need to water frequently during maintenance, keep the environment ventilated, and pay attention to planting some slightly acidic, loose and well-drained sandy soil.
7. Red dates
Red dates are suitable for planting in the colder places in the north of our country, it has a defensive effect, and can provide us with fresh and delicious berries.
Friends who have planted red date trees know that there are many red date varieties that are full of spikes, whether it is young branches or old branches, there will be some hard thorns at the growth node of the plant, and it is still very painful to maintain the red dates, so that it remains compact, but also to avoid the plant growing too high.
There are many varieties of red dates, which were originally grown in China, have thousands of years of planting history, are easy to plant in temperate areas, and there are many varieties that are thorny, and should be carefully maintained.
8. Holly tree
The holly mentioned here is very suitable for cultivating landscape plants, and it can be seen in many urban greenery, and their varieties are rich and ornamental.
These perennial emerald green shrubs, with their extremely strong frost and drought tolerance, do not need to be taken care of regularly.
Holly trees are native to southern and western Europe and can spread overly in some places.
The leaves of the holly tree are leathery, the leaf surface will have a beautiful luster, and its branches grow particularly densely, which is very suitable for growing into a fence, and it is very ornamental all year round.
In addition to the emerald-leaved holly varieties, there are also some varieties with striped leaves that can also breed bright red berries in winter and spring to avoid accidental eating.
9. Tiger thorn plum
Tiger thorn plum is a succulent plant in the tropical desert, with strong drought tolerance, in the south, the temperature can be stable above 5 degrees, can maintain a good growth state.
Raising tiger thorn plum must use some loose and well-drained sandy soil, and when its plant grows to more than 25 cm, it can be regularly pruned, which can control its plant height, and can promote more branches and more flowering.
When the temperature is too low or the watering is too much, the leaves will turn yellow and fall off, which must be noted.
The juice of tiger thorn plum is poisonous, easy to cause skin sensitivity, care should be taken when maintaining this plant, avoid contact with its sap, do not get punctured. After growing up potted plants, do not water too frequently, it is more afraid of water, and the soil is wet and can easily cause root rot.
Raising tiger thorn plums is still particularly simple, and it can even be grafted on other Euphorbia plants, such as keels.
10. Hawthorn
Hawthorn is a deciduous flowering shrub, in the cold places in the north of China, it is more suitable for planting, can be planted in the yard, hawthorn is often used to arrange landscape plants.
Hawthorn varieties are also very numerous, they can grow into the form of shrubs, in early autumn can give birth to some edible small berries, these small berries can be used to make jam or used for medicine.
Some hawthorn varieties have some small spikes on their branches. Flowers are generally white. In autumn, its leaves change color, and in winter, the leaves fall off one after another.
11. Wrinkled papaya
The wrinkled papaya is what we usually call "sticking begonia", it is a deciduous flowering shrub, and some varieties can also breed some apple-like fruits.
The branches of the wrinkled papaya are particularly dense, more suitable for hedge-like, they generally bloom some white or pink flowers in the spring.
Wrinkled papaya can be planted in the north and south of China, they grow rapidly, like well-drained soil, the location of maintenance should have sufficient light, and their adaptability to the environment is relatively strong.
However, it should be noted that the drainage of the soil planted with wrinkled papaya must be good, as long as the plant grows strongly, it will have a high drought tolerance and heat tolerance.