Chilli is one of the most important spice and vegetable crops in India. Whether you grow chilli for green harvest or dry red chilli, getting the right plant population is a big factor for good yield. Plant population depends mainly on two things: seed rate and spacing. If plants are too close, the crop becomes dense, humidity increases, and problems like leaf curl, damping-off, and fruit rot can spread faster. If plants are too far, the field will have empty spaces and total yield may reduce. So farmers should follow a practical seed rate and spacing based on the type of chilli and the season.
In most areas, chilli is raised first in a nursery and then transplanted to the main field. So seed rate is usually discussed in two parts: seed needed for nursery and spacing in the main field. For one acre of transplanted chilli, farmers generally need about 250 to 400 grams of seed, depending on seed quality, germination, and variety. If the seed is hybrid and costly, seed rate is often kept lower and nursery care is more careful. For local varieties or where germination is uncertain, farmers may use slightly higher seed rate to ensure enough seedlings. In hectare terms, this becomes about 600 to 1000 grams per hectare. This range is practical for most transplanted chilli crops.
If chilli is direct sown (which is less common for many commercial types), seed rate is higher because field losses are more and plant stand becomes uneven. In direct sowing, farmers may use around 1.5 to 2 kg seed per acre depending on method and spacing, but nursery-transplanting is still preferred because it gives a stronger, more uniform crop.
Now let’s talk about spacing. Spacing depends on whether you are growing chilli mainly for green fruits (more frequent picking) or for dry red chilli (longer duration), and also on plant growth habit. For many medium to long duration red chilli types, a commonly followed spacing is about 45 cm between rows and 45 cm between plants. This gives each plant enough space to branch well and hold more fruits. For slightly smaller or compact varieties, farmers often follow 45 cm between rows and 30 cm between plants. In green chilli cultivation, where frequent harvesting is done and plants are managed for continuous picking, 45 × 30 cm is common.
In some regions, farmers use wider rows like 60 cm, especially when the soil is heavy, rainfall is higher, or they want easier intercultural operations and better airflow. Wider spacing reduces disease risk and makes spraying and harvesting easier. In summer chilli under irrigation, closer spacing may work because humidity is lower and growth is more controlled. In rainy season chilli, slightly wider spacing is safer because high humidity increases fungal and bacterial problems.
Nursery management affects final plant population. If the nursery is overcrowded, seedlings become thin and weak. Healthy seedlings should be 4–6 weeks old (varies by season) and should be transplanted when they are strong and not too tall. During transplanting, keep one healthy seedling per spot and irrigate immediately to reduce shock. Missing hills should be filled early so the field remains uniform.
A simple way to confirm correct spacing is to see whether sunlight can enter the crop after 30–40 days. If the field becomes too dense, disease risk increases and fruit size may reduce. If the field looks too open with many gaps, yield per acre may reduce.
In short, for transplanted chilli, use about 250–400 grams seed per acre for nursery and follow a spacing of around 45 × 45 cm for large, long-duration red chilli types or 45 × 30 cm for medium types and green chilli. Adjust slightly based on variety, season, and local disease pressure. With correct plant population, chilli plants grow healthier, pickings become easier, and overall yield and profit improve.
