How Many Sunflower Seeds Per Plant: A Comprehensive Guide

How Many Sunflower Seeds Per Plant

When it comes to growing sunflowers, there are a lot of questions that people have. How many sunflower seeds per plant is one of the most common questions that we hear. In this blog post, we will answer that question and provide you with all the information you need to grow beautiful sunflowers!

How many sunflower seeds per plant? Between 1,000 and 2,000 sunflower seeds per plant. The exact number of seeds produced per plant will depend on the sunflower variety and the conditions.

Each sunflower plant produces one giant sunflower head. And each sunflower head can produce between 1,000 and 2,000 seeds. Whether your sunflower plant will produce near 1,000 or near 2,000 seeds will depend on its variety and on whether the conditions are ideal.

Types of sunflowers

Just like other plants, sunflowers come are available in a variety of colors and sizes. Below are four of the most common garden sunflower varieties.

1.    Autumn beauty

This is a great, colorful sunflower choice for sunflower gardens. The bright blooms are usually eight-inch wide and in purple, bronze, and bright yellow combinations. Capable of growing to a height of four feet and featuring numerous braches, thus sunflower variety makes a great cut flower perfect for floral arrangements.

Also called the common sunflower, autumn beauty features edible flower buds that are quite tasty when battered and then fried. Their seeds should be planted two inches deep and an 18-inch spacing observed for the best results.

2.    Teddy bear

This particular type of sunflower features completely double, fuzzy flowers of up to six inches wide. Without a flat center, the vibrant yellow blooms resemble huge powder puffs. Being a dwarf sunflower variety, the teddy bear is perfect for containers and borders. They should be planted half an inch deep and in groups of three to four seeds.

3.    Mammoth

This is the biggest garden sunflower you’ll ever come across. It can grow up to 12-feet tall and has massive 12-inch flower heads with a great abundance of seeds. Its fast growth makes it a perfect screen, hedge, or sun-forest for kids. For the best outcomes, the seeds should be planted one inch deep and spaced two feet apart.

4.    Moulin rouge

This is not your usual sunflower. They feature eye-catching dark red petals that have a small hint of yellow right at the base that is highlighted with an ebony middle. It is very easy to grow and also a consistent bloomer. It grows up to four feet tall and its dark flowers are only four inches wide. The Moulin rouge is considered to be an exceptional cut flower as it does not have pollen.

Tips for growing sunflowers

Growing sunflowers is not really difficult as the plant almost grows on its own. And once your sunflowers start to grow, they do so very quickly. However, they are a few things that can be done to ensure that you get the possible results, including the maximum number of seeds per head. Here are few useful tips to follow when growing sunflowers.

1. Go for a sunny spot

Just as depicted by the name, sunflowers love the sun. Search for a spot that receives plenty of full sun for these quick-growing annuals. You should also think of what you will grow near or around the sunflowers as most sunflowers grow really tall and might end up casting a shade on the neighboring plants. The relatively short growing season of about 70 to 100 days permits planting all though most gardening areas.

2. Timing is vital

Deciding when to grow sunflower seeds calls for a little waiting. The seeds should be planted during late spring when the ground is warm. Most sunflowers will only germinate in soil temperatures varying between 70 to 85 degrees Fahrenheit. The most appropriate time to plant the seeds is just before the planting soil hits this temperature. Search for ground with temperatures of approximately 65 degrees Fahrenheit. For a lot of areas, this is roughly three weeks following the last frost.

Growing sunflowers indoors will give a nice head start on the planting season. All you need to do is to tuck the sunflower seeds into peat pots at the end of the spring frost. Make sure that they are of the correct size for transplanting once the soil temperatures are right.

3. Provide plenty of moisture

Given that sunflower seeds contain a lot of natural oil, they need a lot of water for their germination. The ground should be thoroughly watered after planting. This should be followed by light, regular watering up until germination happens. If planted indoors, cover the peat pots using a clear plastic wrap to lock in the moisture. Make sure to get rid of the plastic covering once the seeds sprout.

Even though sunflowers need lots of water for germination, they will only need about one inch of water per week after the seeds sprout. You can use a watering nozzle to water your plants.

4. Thin the seedlings

As soon as the seedlings develop their first set of true leaves, they should be thinned to the recommended row spacing based on the variety planted. The small sunflower varieties require a six-inch spacing while the bigger varieties require a three-foot spacing. Indoor seedlings should be thinned to one seedling per pot. Just select the strongest plant and cut back the rest.

5. Fertilize

In case you prepared your planting soil with compost and/or manure, you will not need any extra fertilization in the growing season. However, if you feel that your sunflowers need better nutrition, apply a slow-acting granular fertilizer to the soil.

6. Control the weeds

Weed control is one of the greatest challenges associated with sunflower care. If left uncontrolled, weeds will compete with your sunflowers for nutrition and moisture. You can hoe, till, or pull out the weeds by hand. You can also lay down a lot of mulch to eradicate the weeds. Simply apply up to four inches of organic mulch to the sunflower garden. Be careful to leave a bit of bare soil around every plant stalk to deter diseases and pests.


You now know all the important things you need to know about growing and caring for sunflower plants. If you needed something to push you to grow sunflower plants, then the information you have seen should be enough. Sunflower plants are stunning plants. They are relatively easy to grow, they look spectacular throughout summer, and they produce plenty of edible seeds.