How Long Does It Take For Sunflowers To Grow (And Why)?

Exact Answer: 7 To 10 Days

Sunflowers are beautiful flowers that one can plant in a variety of ways. They require six to eight hours of direct sunlight every day and lots of water, but they also need space to grow. 

Sunflowers can grow up to 12 feet tall if not contained, so it’s essential to know how long it takes for sunflowers to grow before planting the seeds.  

They can grow in just about any soil, and they only take around six weeks to mature. It takes 7 to 10 days for the seedlings to start growing. If the climate is too cold or dry during the winter months, the sunflower will die.

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How Long Does It Take For Sunflowers To Grow?

Sunflower7-10 days
Sunflower plant to bloom flowers120 to 180 days after being sown

Sunflowers are a great addition to one’s garden. If a person is looking for an easy flower to plant this season, sunflowers are a perfect choice. They start growing 7 to 10 days after planting them. 

The first year that one plants them expects only a few blooms or none at all, depending on where they live and when they planted them. 

However, if the location provides ideal growing conditions and enough time passes between planting seasons (approximately seven weeks), one should get a mature plant soon enough.

Although the plant may start growing within 7 to days of planting them, one must wait for a month to see the flowers bloom. It is necessary to protect the sunflowers with nets and baskets to ward off birds and insects.

It is important to select good quality soil rich in nutrients to make it healthy and to grow the plant successfully,

Sunflowers are grown for their oil content, so they grow quickly once the first few leaves start to show. They may take anywhere from depending on weather conditions and how one waters them between one day and ten days to completely grow depending on the type of sunflower.

Location is everything for the sunflowers. Sun is, of course, an essential ingredient for its growth. Since sunflowers are tough plants, one does not need to buy a lot of fertilizers; even a small amount of granular fertilizer will suffice.

Why Would Growing Sunflowers Take So Long?

Sunflowers grow because they use photosynthesis – it needs a lot of sun for this to happen. They need at least 8 hours of sunlight and warm temperatures. 

One does not even need to predetermine their height. So, no problem with growing it; one needs some patience.

The length of time it takes for sunflowers to grow varies considerably depending on the region they are planted in, whether or not they are pollinated, soil composition, and other factors. The average size of a sunflower is about 3 feet tall.

A study found that once temperatures are lower than 44 °F, the growth rate slows tremendously. 

Another reason is one plant can produce up to 1000 seeds that sprout at different times, so harvesting starts when they’re still young and continues until late in the season when some plants develop mature seeds. 

Full maturity varies by region but always has significant variation in timing between plants spaced closely by weather-dependent climate patterns – inadequate rainfall; too little or too much daytime sunshine; insufficient water.

If one wants an individual plant for themselves – a water-tight container or pot is recommended. Make sure the container has good drainage holes. 

Put an inch of organic potting soil in the bottom and then add perlite- enough to cover the hole in the bottom half up the sides. Mix in some composted or aged manure, if desired. Place seeds on top of the mixture and cover with another inch of the organic mixture.


Sunflowers are among the few flowers to be attracted primarily by our yellowish-green light, or what we call “visible light.”

Sunflowers absorb a specific type of sunlight’s energy and use it for photosynthesis. More specifically, their petals contain a particular pigment called chlorophyll which absorbs red and blue wavelengths of sunlight and converts them into green wavelengths. 

Water when dry but make sure they are not kept wet for extended periods because moisture can kill them. Maintain weed-free conditions around each plant so sunlight may reach all parts evenly so that the sunflowers will bloom in perfect condition.



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Hi! I'm Nidhi.

Here at the EHL, it's all about delicious, easy recipes for casual entertaining. So come and join me at the beach, relax and enjoy the food.

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