The best way is to test the seeds by taste and appearance. If the inside of the seed looks green or empty then it is not ripe. The seeds ripen from the outside of the head to the center. The petals will be shriveled, the head down-turned and yellow on the back. Sometimes the seeds - especially those in the middle - do not ever fill properly. When ripe, it is easier to rub the seed loose from the head. The seed color usually darkens also.
sunflowers are ripe when the center of the flower is a brownish-yellow color. and when the petals are not white anymore .
It begins to bloom.
The smallest sunflower ever measured was 2 and 1/5 inches tall when fully grown.
You know its fully grown when you scroll over it and it is able to sell
You know when your plants are fully grown
How would you know it wasn't fully grown? It is most likely that it will not get noticeably larger.
i dont know do i
The height of the plant and the color of the leafs.
The tallest sunflower measured 30 feet and 1 inch and was grown in Germany in 2014.
they are fully grown when they are 6 years old
8,75m
The logical answer is that it looks like a sunflower because that's what it becomes.
Nevermind. When you are fully grown and mature. You should be by around 20.
A gerbil is full grown by 6 months old and measures 7-8 inches including the tail.