Plus, yellow is not the only color sunflowers are found across the world. You can find gold, orange, mahogany red, and bronze sunflowers as well. And the center part of the flower also has various colors like yellow, purple, red, and brown.
Although the plants are sturdy, excess water can result in loosening of the soil, making it difficult for the roots to stay steady. Plus, the plants won't have enough support to keep the head stable from the wind. Water the plants 20 days before and after the blossoms appear.
If the soil is rich for growth, you need to water the plants only if there was no rain for a week or two. It's also recommended that you grow large groups of sunflowers to increase the stability of the soil. This helps the roots to reach deep into the soil, hold the moisture in, and protect the plants from any damage caused by the wind.
Providing these plants with a rich diet is not a priority, given that the soil you've planted them in is rich to begin with. If the soil has lots of organic matter like earthworms and microbes, the soil is already getting the necessary nutrients it demands.
Try to control the admission of nitrogen as it delays the appearance of the blossoms. Plus, while growing super-sized seed heads, use slightly more fertilizer when you first notice them.
Once the plants sprout, place 2 inches of chopped leaves, wood chips, or straw on the soil. And if you're using peat moss, make sure to add some more organic materials as well (otherwise it results in repelling water).
These insects and pests can cause serious damage to the plants, flowers, seeds, leaves, and stems. You can use pesticides that are specifically made for these plants. However, it is advised not to spray the pesticides when bees, wasps, ants, butterflies, and other pollinating insects are present.
Weed Control Requirements
As these plants tend to grow really fast, there are chances that unwanted weeds can also grow on their own. This can create shades for sunflower seedlings and stop their natural growth cycle. You can't stop the weeds from growing, but you can surely control its population.
You can either till or hoe the area in the middle of the rows where the plants are growing. Or, you can use some chemicals to kill the weeds. Make sure you use chemicals that don't affect the seeds. Depending on what type of weeds are growing, you can use appropriate chemicals to kill it.