Today, we look at the vegetable seedling nursery establishment. We say in food production circles that the success of any production system depends on the kind of seed we are sowing. So it is with seedlings. Healthy seedlings grown in a well-managed nursery will determine the yield and consequently the profits.
What is a vegetable seedling nursery?
A nursery is a place or an establishment for raising or handling of young vegetable seedlings until they are ready for more permanent planting.
Let us first look at why establish a vegetable seedling nursery.
Advantages of a nursery
- It provides favourable growth conditions i.e. germination as well as growth.
- Better care for younger plants. It is easy to look after nursery in a small area against pathogenic infections, pests and diseases and weeds.
- Nursery helps in making more efficient use of land.
- It helps to improve crop uniformity in the field.
- Nursery helps to reduce field management cost.
Disadvantages of a nursery
- Increases the cost of production. Because of the use of expensive certified seeds.
- You need extra labour in establishing nurseries before transplanting.
What are the types of nurseries?
Nurseries can either be established in containers (boxes and trays) or on seedbeds.
Steps to establish Vegetable Seedling Nursery
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Select a site for your nursery
Consider the following when selecting a site for your Vegetable Seedling Nursery Establishment.
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- The nursery should be easily accessible. Also, close to a permanent source of clean water for irrigation.
- It should be on flat land. This prevents erosion of soil and loss of soil nutrients.
- Site it away from other vegetable farms to avoid the spread of pests and diseases, at least 50m.
- Site nursery in areas with well-drained and fertile soils. It should be free from soil-borne diseases, pests and nuisance weeds.
- Avoid heavily shaded areas. Regulate shade at different stages of the seedlings.
- You must protect the vegetable nursery from all kinds of livestock.
Read also: 6 Basic Soil Problems and Recommended Solutions in Agriculture
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Purchase / select your seeds
Buy certified seeds from reputable seed companies. You may use your own seed, But make sure you select the seeds with ideal and preferred qualities.
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Carry out a Seed Germination Test
Avoid wasting seed. Do a germination test. A germination test will help you to know if your seed will germinate after sowing. Also how many will germinate. So, you will know how many you require for your nursery. You should do this a couple of days before you sow the seeds on your seedbeds.
Read detailed steps on How to do simple Seed Germination / Viability Test
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Prepare your Seedbed
Make beds 1.0m – 1.2m wide x 2m or longer. This standard size makes it easy and convenient to work around the seedbed. Water the beds. Cover with 4cm thick dry grass, sawdust or rice straw. Leave for 2-3 days to reactivate spores of disease pathogens. Then burn to sterilize the soil. You may also cover seedbed with transparent plastic sheets for 5 – 8 weeks to sterilize the soil.
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Now sow your seeds
- Before you sow, treat seeds with recommended seed dressing / hot water before planting.
- Drill thinly in rows 10cm apart and cover with a thin layer of soil.
- For seed-trays sow 1 seed per cell and cover with newsprint.
- Cover bed with dry grass (non-seeded), transparent plastic sheets or palm fronds and water.
- Seeds emerge within 5 – 7 days.
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Care for seedling after Germination
- Remove cover after emergence and cover seedlings with insect-proof nets.
- Prick out seedlings after first true leaf stage (about 2 weeks after sowing). Also, thin out weak, malformed and oversized seedlings. That is if seedlings are too crowded.
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Fertilize
Fertile soils may not require fertilizer application. Observe seedlings as they grow and if leaves are pale yellow, apply a solution of NPK (5g/L) 1 week after germination. MAP (monoammonium phosphate) application will promote sturdy root growth.
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Irrigate or provide water
Water lightly and regularly. The seedlings are tender and delicate. So, any strong splash of water may cause them to break or bend or even uprooted.
Read also: Types of Irrigation: Advantages and Disadvantages
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Control weeds in the nursery
You can reduce the problems of weed control in a vegetable nursery if you consider the following factors.
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- Good site selection.
- Recommended weedicides/herbicides.
- Good seedbed preparation.
- Hand-picking weeds as they appear.
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Manage Pests and Diseases in the nursery
Major pests in vegetable seedling nursery establishment are aphids, grasshoppers and whiteflies. Also, crickets, leaf miners, beetles, caterpillars, snails (molluscs), rats, and mice.
How to control pests
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- Practice good sanitation
- Cover seedlings with good insect-proof nets
- Scout regularly to assess pest and disease incidence
- Where necessary spray seedlings with approved insecticides
- Use approved rodenticides at recommended rates or traps to control mice and rats
Major Diseases
Damping-off: Caused by Pythium. Results in the death of seedlings before or shortly after emergence. You may control this by nursing seeds on well-drained soils and by regulating irrigation. Solarizing the soil for 6-8 weeks before planting. Or apply approved copper-based fungicides to help control this disease.
Early blight: Caused by the airborne fungus Botrytis. Control by use of disease-free seeds. Thin out densely sown seedlings or prick out into individual containers. Avoid overcrowding.
Root-Knot Nematode: Nematodes feed on young roots causing wilt. Control by solarization, application of spent neem seed granules, or approved nematicides.
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Managing Seedling Maturity
Seedlings are ready for transplanting at five leafed stage. At the time of transplanting seedlings should be:
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- Stocky and sturdy (look tough and strong)
- Have a good root system
- Free from any insect pests and diseases
Hardening: Includes any treatment that makes the tissue of seedlings firm. Firm to withstand the unfavourable environment. Or open field conditions like low or high temperatures, hot and dry winds, etc.
Harden seedling for 7-10 days before transplanting.
Read also: Steps in Transplanting Vegetable Seedlings from Nursery to the Farm
Reference: Vegetable Nursery Management (mofa.gov.gh)
