Depending on when your final spring frost falls, you should plant sunflowers indoors. The last spring frost typically occurs on or around May 15. Subtract 4 weeks from the latest frost date in your area. Planting too early will result in leggy, weak plants. When it comes time to transplant the plants into the garden,
You'll need grow lights if you're going to cultivate sunflowers indoors. Even with a bright window, sunflower seedlings become exceedingly lanky when grown exclusively in the light of the window. Leggy seedlings frequently produce adult plants with flimsy stems that can't support themselves upright in the garden.
Another drawback of this method of planting sunflowers is the necessity to gradually acclimatise the seedlings before moving them permanently outside. Take the seedlings outdoors for a few hours each day until your final anticipated frost,
The final average date of frost determines when to sow sunflowers outside, just as it does when beginning the seeds indoors. A months or more can be added to the delay in the procedure. Sunflower seed sowing should begin 7 to 10 days after my latest frost date.
Sunflower seeds should be sown straight into the ground. Dig individual holes with a trowel that are approximately one inch deep, or create a ditch or furrow to place seeds in a row. For dense plants, space the seeds approximately 6 to 8 inches apart; for wider spacing, space them about twelve to fifteen inches apart.
Do not be scared to thin out any of the seedlings if you sown the seed a little too thickly. Attempt to remove them carefully so that you can transfer the seedlings you have trimmed to a different area of the garden if their roots are still in good shape.
About a third of a distance up from the bottom, cut off the jug's top with the scissors. To maintain both top and bottom of a jug together, leave a two-inch-wide portion uncut after cutting virtually the entire way around.
Invest in high-quality seed. I use sunflower seeds with black oil. These are the absolute cheapest sorts, while other kinds can While you add potting soil to the jug's bottom, hold the jug's top off to the side.