Sunflower Mix Seeds
When should I plant
It’s best to sow sunflower seeds directly into the garden (or outdoor containers) after the danger of spring frost has passed and when soils have warmed to at least 50°F. Sunflowers dislike having their roots disturbed,so we recommend direct sowing instead of transplanting.
Site consideration
Sunflowers need well-draining soil to prevent waterlogging and loose, deeply-tilled earth to accommodate their long taproots. Shelter from strong winds—for example, along a fence or near a building—helps as they mature. Larger varieties may become top-heavy, and a strong wind can topple them.They grow best in slightly acidic to alkaline soil (pH 6.0–7.5) but are generally adaptable to various soil types.
Water
Regular water about 3 to 4 inches from the root during germination. Once the plant is established, water deeply, though infrequently, to encourage deep rooting. Unless the weather is exceptionally wet or dry, water once a week with several gallons of water.
Sunlight
Sunflowers require full sun exposure: at least 6-8 hours of direct sunlight daily. They grow best with maximum sun exposure and will actually turn their heads to follow the sun throughout the day (heliotropism).
Stake
Tall species and cultivars require support. Bamboo stakes are a good choice for any plant that has a strong, single stem and needs support for a short period of time.
Seed Germination
Seeds typically germinate in 7-21 days when soil temperatures are between 70-85°F. Plant seeds 1 inch deep and keep soil moist but not waterlogged. Germination is fastest in warm soil conditions.
Seeding Rate
1oz seeds cover 908 square feet.
Other Elements
Fertilization
Sunflowers are heavy feeders, so the soil needs to be nutrient-rich with organic matter or composted (aged) manure. Or, work in a slow-release granular fertilizer 8 inches deep into your soil.
Weed control
Keep the area weed-free, especially during early growth stages. Mulch around plants to suppress weeds and retain moisture. Once established, sunflowers' dense growth and height naturally suppress most weeds.
Seed Storage
The seeds will maintain a high germination percentage if stored under proper conditions. How long your seeds remain viable will depend on the temperature and moisture levels the seeds are exposed to. Seeds which are improperly stored will quickly deteriorate if unprotected against high humidity and dramatic temperature fluctuations day after day.
For best results, keep the seed in our moisture-proof ziplock sealing bags, which provide a better moisture prevention effect. Glass jar or plastic containers with snap-on lids works well too, add a packet of desiccant before sealing into the seed, such as silica gel to remove any moisture remains in the storage container. Seed stored under these conditions will remain viable for as long as years.
Factors Which commonly Cause Poor Results
1. Improper drainage soil
2. Sowing depth more than one inch
3. Covering the seed too deep beneath the soil surface
4. Cover a large area with a small amount of seed.
5. Plant at a wrong time of a year
6. Lack of sunlight
7. Inadequate rainfall after seed germination. The area should not be allowed to become completely dry. Supplemental watering may be required to sustain plant life.
8. Extreme weather conditions: hail, drought, excessive rainfall, floods, unseasonably cold temperatures.