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Plastic Seed Starter Pots For Plants


Use the seedling pots to raise seedlings

The use method of plastic seedling pots is relatively simple. Select suitable seed pots with a depth from 6 cm to 30 cm. Fill the prepared substrate into the seed starter pots, do a good job in disinfection and sterilization, and then the seedling can be sown. The use of seed starting pots has many advantages, such as rapid emergence, neat emergence, convenient management, time-saving and labor-saving.


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1. How to use the seedling pots

1.1 Preparation of seedling pots

First select the appropriate seedling plant pots. At present, the seedling pots on the market are in the style of plastic terracotta pots and seedling cups, with different depths, ranging from 6 cm to 30 cm. Prepare a suitable substrate, put it into the seed pots, disinfect and sterilize it, and then you can sow seedlings.


1.2 Benefits of using seedling pots

There are many advantages to cultivating seedlings in plastic seed pots, such as effectively avoiding seed waste, reducing the use of seeds and saving costs. At the same time, the seed nutrients are relatively uniform, and the seedlings can emerge quickly and neatly. When the seedlings grow out, it is also more convenient to manage and save time and labor.

seed starter pots for plants

1.3 Application method of seedling pots

When using the plastic seed starting pots, first fill the substrate into the seed pots, sprinkle an appropriate amount of seeds or plant seedlings, and water appropriately for maintenance and management. After successful seedling raising, it can be transplanted and changed. The use of seed starter pots can also facilitate transportation and management.


2. Advantages of seedling pots

2.1 Transplanting technology

When the conventional green seedlings need to be transplanted, it is necessary to cut branches and remove the crown, otherwise, it is extremely difficult to survive. 


The seed starter pots can control roots and raise seedlings quickly. This kind of technology adopts a special seedling pot, so the growth of taproot can be controlled, which can promote the rapid growth of capillary roots of plants and avoid the formation of thick and short fibrous roots.


The plastic seed starter pots can be planted and transplanted in a large area, and it does not need to wrap roots, cut branches or pick leaves. It can be transplanted in a complete crown, which can be said to be a mobile forest.


2.2 Survival rate

The compostable seedling pots can enhance the survival rate. Due to the unique design, the root control container is very breathable and will not show root rot and taproot entanglement. Moreover, the special substrate for root control is adopted, which can effectively control the premise of water and fertilizer. Therefore, using seed pots for seedling raising can greatly improve the survival rate.


2.3 Transplantable in 4 seasons

The seed starting pots can be used for four seasons. The seedlings planters can maintain the seedlings without lifting and damaging the roots. Starter pots for plants are a kind of cheap planting pots, which is generally used for large-area planting and cultivation.


The seed starter pots are mainly used for large-scale agricultural planting and strain culture in the field of industrial chemistry. It is a tool that can reduce costs and improve the survival rate. When using plastic seedling pots, it is best to use the professional nutrient soil of the seed pots, which can improve the survival rate of seedlings.


The seed raising pots can save seeds. After seedling raising, the seedling forming rate is relatively high. It can also save maintenance costs and resources, make it easier to fix seedlings and select seedlings, cut roots and rejuvenate, and improve the survival rate of transplanting.


What are the methods of raising seedlings? Many people want to ask, but they can't find experts. Don't worry now, because we will teach you the method of seed breeding here. You should listen carefully, which is very useful!


3. Preparation before sowing

3.1 Prepare seedling pots

The advantages of using starter pots for plants: neat seedlings, strong seedlings, saving seeds, developed roots, easy transplantation and so on. It is recommended to use plastic seed trays or seed starting pots for seedling raising, and do not sow directly in the field.


Directly sown in the field, there are many diseases and pests transmitted in the soil, the ground temperature is low, and the moisture and humidity are not easy to control, affecting the germination rate. Propagator pots seedling raising is also convenient for statistics of germination rate.


When choosing seed starting pots, it is not suitable to choose too large seed pots. Too large seedlings planters have too much pot soil and slow dry wet cycle, which is not conducive to stimulating root development. The seedlings planters with a diameter less than 20cm shall be selected for the seedling, and the larger seedling pots shall be replaced after the plant grows up.


3.2 Seedling substrate

Seedling substrate requires loose soil, good air permeability, water and fertilizer retention, clean, disease-free and good fertility. It mainly uses light media such as peat soil, coconut bran, perlite and vermiculite, which are generally mixed. The general ratio of peat, vermiculite and perlite is 3:1:1, such as 85% peat soil + 10% perlite + 5% vermiculite. Peat should not be too fine. Premium Perlite with a diameter of 3-4 mm and vermiculite particles with a diameter of 3-5 mm are ideal.

plastic plant pots for seedlings

Some fertilizer can be properly added to the matrix 2kg of diammonium phosphate, 2kg of high-temperature expanded chicken manure or 2 ~ 2.5kg of nitrogen, phosphorus and potassium compound fertilizer were added to 1m3 matrix. In principle, a new substrate should be used for seedling raising, and carbendazim or chlorothalonil should be used for disinfection before sowing. Most seeds germinate well on the substrate with a pH value of 5.5-5.8, but a bunch of red, geranium, marigold and Malachite grass needs a pH value of 6.2-6.5.


3.3 Seed pots filling

Mix the matrix well and then put it into the greenhouse trays and pots. The matrix does not need to be compacted during the seed starter pots filling process, but can be gently leveled, otherwise, the physical properties of the matrix will be changed and the permeability of the matrix will be reduced.


3.4 Watering

Pour the bottom water with a fine nozzle. The size of water droplets should not impact the soil surface and keep the soil surface flat.


3.5 Seed soaking

In order to prevent irregular emergence, seeds should be pretreated, i.e. seed selection, soaking in warm water, seed dressing with chemicals, washing, germination promotion, etc., and then sown. Proper seed soaking can promote germination and improve the germination rate.


If the seed coat is soft and thin, the seed can be soaked in cold water, if the seed coat is thick, the seed can be soaked in warm water or hot water, and very small seeds can not be soaked. For example, soaking sweet peas and Black Eyed Susan overnight can improve the germination rate and make germination faster.


4. Sowing

Sowing methods can be divided into sowing, on-demand sowing or drill sowing. Sowing is to spread the seeds evenly on the sowing soil, which is often used for small vegetable seeds (such as cabbage, amaranth, etc.); Spot sowing is to dig holes and sow seeds according to a certain plant type distance, which is suitable for large seeds (such as balsam pear and cucumber); Drill sowing is sowing by ditching at a certain row spacing, which is not commonly used.


4.1 Sowing density

One or more seeds can be sown per compostable seed pots according to the actual situation. Seedling pots sowing, general varieties can sow 1-2000 seeds per square meter. 


First, divide the seeds evenly into several parts according to the area of the sowing and germination pots, one for each starter pot for plants. Evenly sprinkle the seeds in the starter pots for plants, and the small seeds shall not be covered with soil. Large seeds are slightly covered with soil for 3-5mm. Too deep will make the seeds do not germinate and the germination rate is low.


Larger seeds can be evenly sown on the substrate or in strips. Smaller seeds such as petunia and goldfish grass can be mixed with clean fine sand before sowing. Especially large seeds, such as sweet peas and cyclamen, can be sown on demand.


4.2 Sowing depth and soil covering

The depth of sowing is determined by the size of seeds and the light demand for seed germination. Generally, the sowing depth of seeds is 2-3 times the diameter of seeds. 


Some varieties, such as Petunia, corydalis, starry flowers and four seasons Begonia, need light for germination, do not need to cover the substrate, and are directly sown on the surface of the seed starter pots soil.

plant pots for growing seeds

Some varieties need to be slightly covered, such as a string of red, goldfish grass and calyx spur flowers; Some seeds should be covered thicker and sown deeper, such as ornamental millet. The recommended covering material is coarse vermiculite, which has good water retention and air permeability.


4.3 Water spraying

After sowing or covering, spray water with a fine mist nozzle and pour it thoroughly to make the seeds fully in contact with the substrate and covering materials in the seed pots.


4.4 Coverage

Cover the plastic seedling pots with glass or plastic film to maintain air humidity and heat preservation and warmth in winter. The film can not be covered in summer, and the film can not be sealed. Both sides must be ventilated.


4.5 Shade

If you sow in summer, you must use a shading net to shade, otherwise, the light is too strong and the water evaporation is strong, which will affect the seed germination.


5. Management after sowing

5.1 Temperature

According to the requirements of specific varieties, an appropriate temperature is given, and the germination temperature of most seeds is between 20-25 ℃. Too high and too low temperatures will directly affect the germination rate of seeds.


5.2 Humidity

Water management after sowing is very important. When the seed pots soil temperature is low at night, the water loss is less, so there is no need to replenish water or less water at the seedling stage; If the soil temperature of small seedling pots is relatively high, water should be replenishment according to actual needs at the seedling stage.


When raising seedlings in summer, the water evaporates very fast, and the water must be supplemented at any time according to the actual situation. If the seed is very fine, in order to avoid the scouring of water, the method of soaking seed starting pots and trays can be used to replenish water.


5.3 Illumination

Except that some varieties like Cyclamen need darkness during germination, most seeds are conducive to germination under light conditions. The seeds must be exposed to light after germination, otherwise, the seedlings will grow in vain. After moving to the big starter pots for plants, pay attention to regularly changing the direction of the plastic seedling pots with tray.


5.4 Remove the covering

After the seeds germinate, the mulch such as plastic ground cover shall be removed in time. For 60% - 70% of the seeds, the membrane should be removed after the cotyledons are unfolded to prevent the seedlings from growing in vain. At the same time, the humidity of the seed planting pots substrate should still be maintained, so that the cotyledons of some seeds that have not germinated can successfully protrude from the seed shell.


5.5 Transplantation

When the plastic plant starter pots seedlings grow to be suitable for transplantation, they should be planted or settled in time, otherwise, it is easy to cause seedling overgrowth and production delay. The transplanting time of various seedlings is different, which needs to be determined according to the actual situation.


Generally, there are two planting methods, one is direct seeding, and the other is seedling transplanting. Direct seeding is to directly sow seeds into seed pots of appropriate size, and no transplanting will be carried out in the whole growth period except inter seedling. 


Some vegetables, such as beans, radishes and carrots, because they have straight roots and underdeveloped roots, transplanting seedlings will damage the normal development of roots. Direct seeding is generally used. Direct seeding is also used for fast-growing vegetables such as cabbage and amaranth.

seedling pots and trays

Direct seeding usually sows more than the number of seedlings to be left, so that there will be crowding after the seedlings emerge. At this time, it is necessary to pull out or transplant the over dense seedlings to other places, so as to expand the distance between seedlings and ensure air circulation between seedlings, uniform and sufficient light. This process is called thinning seedlings. 


When thinning seedlings, attention should be paid to selecting and retaining strong seedlings and removing weak seedlings, sick seedlings and deformed seedlings. In addition, thinning seedlings should not be too thin at one time. Some plants need thinning seedlings many times in the process of growth.


Seedling transplanting is to sow the seeds into the eco friendly seedling pots first. When the small seedlings grow to a certain size, they shall be moved to other seed pots in time for further planting. Some vegetables have more developed roots and more fibrous roots, such as cabbage, cauliflower, eggplant, tomato, cucumber and towel gourd. 


Seedling raising and transplanting can save seeds, produce seedlings neatly and facilitate centralized management. When transplanting, special attention should be paid not to damage the root system of seedlings. Before seedling lifting, the soil or substrate should be fully watered before transplanting, so that the seedlings can survive quickly after transplanting. Shade should also be paid attention to during the slow seedling period after transplanting.


6. Precautions during planting

After the seedlings are taken out from the seed starter pots, the removal amount of the original soil should not be too much to reduce the damage to the root system. After planting, the root fixing water shall be poured thoroughly to make the root system and original soil closely combined with the new soil as much as possible, which can be poured repeatedly several times. Do not apply any fertilizer. If possible, the cheap seedling pots soil can be watered once with fungicide. Pay attention to the preparation concentration of fungicide. Common Fungicides such as Carbendazim and chlorothalonil are all OK.


Seed starter pot planting is relatively easy. The key point to pay attention to is that when removing the plastic seed starter pots, it is best not to remove all the original soil, so as to reduce the damage to the root system. After planting, do not directly enlarge the sun and exposure it to the sun. At least one week should be allowed to take the plastic seedling pots. After entering the normal growth state, it can enter the normal maintenance and management.


The soil in the seedling stage may be different from that after planting. The seedling root system is also relatively weak, and the root needs to be ventilated. If you plant in small seed starter pots, the soil in the small seed pots must be less, and the soil is less. It is easy to see dry and wet. The dry and wet cycle will be fast. The permeability of the root system will be good, the root system will grow well, the roots will grow well, and the seedlings will be good.


When planting seedlings in large nursery seedling pots, because there is more soil, it is necessary to water more, the soil dries slowly, and the dry wet cycle is slow. If the large seedling starter pots are watered with enough water, they may not dry for a week, and the root of the seedlings is always airtight, which is very easy to rot, and the seedlings will die if it is not done well.


Generally, flower and seedling false planting grows faster than direct planting. In order to save trouble, many people basically buy large seed pots and trays to plant seedlings. As a result, the seedlings wilt, grow badly and die easily. How big is the seed starting pots for artificial planting and colonization?


It is suggested that the seedlings should be planted in 10cm plastic plant pots. When the roots of the seedlings grow all over the seed pots and the roots can be seen from the hole at the bottom of the plastic seedling pots, they can be planted. The planting pots are 20cm plastic plant pots. In fact, planting is to make the seedlings grow stronger, and planting is to make the seedlings grow bigger and better after they grow up.


What seedling pots and trays are used for artificial planting? Our 1 gallon pots have a high cost performance. We can buy small square nursery pots or small plastic plant pots from foreign trade. The plastic terracotta pots have different specifications, with good water permeability and convenient transplantation. The seedlings come out when buckled, without damaging the root.


7. How to water after transplanting

7.1 Pour fixed root water

The first watering after transplanting (changing seed starter pots) is called root setting water. The root fixing water must be poured enough and thoroughly. Generally, after planting, it shall be watered twice continuously. After the first watering, the water shall be dried, and after seeing the water flowing out of the bottom hole of the starter pots for plants, it shall be watered again, so as to ensure that the soil is fully absorbed and closely connected with the root system.


In summer, the plant respiration is strong, and the propagator pots soil is required to have good air permeability. Therefore, when the seed pots soil is not dry, it is generally not watered to avoid too much water affecting the air permeability, but it should be watered immediately after it is dry and must be watered thoroughly. 

seed starting pots

Judge whether the seed starting pots soil depends not on the topsoil, but on the soil below the topsoil. If the seed germination pots soil cracks due to being too dry, the watering cannot be completed at one time, otherwise the water will leak directly to the seed growing pots bottom along the gap, and most of the 4 inch seedling pots soil is still very dry. Wait a moment after the first watering, and then pour it again after the soil crack is closed.


If you forget to water for many days, resulting in drought and wilting, do not rush to water. First move the tree seedling pots to a cool and ventilated place, spray water on the leaves with a watering can 2 ~ 3 times, and then water a small amount after the leaves slow down. After the root system recovers its water absorption function, water it thoroughly.


7.2 Water carefully in midsummer and cold winter

Water temperature has a direct impact on root physiological activities. If there is a great difference between the water temperature and the sprouting pot soil temperature (more than 5 ℃), watering will cause a sudden change in soil temperature and damage the root system, but affect the root system's absorption of water and produce physiological drought.


Therefore, watering is better when the water temperature is close to the soil temperature of the plastic seedling pots, especially in winter and summer. In winter, it is best to store the water indoors for a period of time or add warm water slightly to raise the water temperature to 15 ~ 20 ℃, and then water it. In summer, watering under the scorching sun and high temperature at noon should be avoided.


7.3 Watering time

The choice of watering time should try to make the water temperature close to the germination pots soil temperature. In general, the difference between the water temperature and the soil temperature of the seed starter pots is within 5 ℃, so watering is relatively safe and there will be no root damage. Specific to the daily watering time, spring, summer, autumn and winter are also different. In spring, autumn and winter, around 10 a.m. and after 4 p.m. are the appropriate time for watering.


At noon in midsummer, the temperature is very high. If you pour cold water at this time, but because the soil temperature of the mini seed pots suddenly decreases and the root hair is stimulated by low temperature, it will immediately hinder the normal absorption of water, resulting in leaf wilting and leaf scorching, and in serious cases, the whole plant will die. 


Therefore, avoid watering at noon in hot summer. Similarly, in winter, the temperature difference between morning and evening is large. Of course, watering should be carried out when the seedling pots soil temperature is close to the temperature at noon. If water in the evening in winter, the water loss will be slow, which will increase the soil and air humidity, which will easily lead to vegetable infection, disease and freezing injury.


When raising seedlings, we must choose a suitable living environment for them. What should be prepared before sowing, how to sow and the management after sowing are introduced very clearly. In addition, the most indispensable for seedling cultivation is water and sunshine, which are indispensable conditions for planting.


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