biggest sunflower seeds to plant 20 Mongolian Giant Sunflower Seeds

biggest sunflower seeds to plant 20 Mongolian Giant Sunflower SeedsUp for sale is one pack of 20 Mongolian Giant Sunflower seeds. These sunflowers are a novelty in the garden and make a great conversation piece as they grow 12 feet tall with a single stem giant yellow sunflower. We offer flat rate combined shipping on all orders, no limit on the amount or type of seed packets. CULTURE Soil temperature: 70 75 degrees fahrenheit Germination lighting: Dark required Germination days: 4 8 days Grow on temperature day: 55

Up for sale is one pack of 20 Mongolian Giant Sunflower seeds. These sunflowers are a novelty in the garden and make a great conversation piece as they grow 12 feet tall with a single stem giant yellow sunflower.

We offer flat rate combined shipping on all orders, no limit on the amount or type of seed packets.

CULTURE

Soil temperature: 70 - 75 degrees fahrenheit
Germination lighting: Dark required
Germination days: 4 - 8 days
Grow on temperature day: 55 - 60 degrees fahrenheit
Plant spread: 24"
Plant height: 12'+
Plant type: Annual
Maturation days: 80 days

These jumbo sized sunflowers require a little different soil preparation than the other sunflowers we sell. First step it to take a pitch fork and loosen your soil 12" deep. Next enrich you top soil and till 6" deep until your soil is the consistency of brown sugar. When soil is consistently 70 degrees (for zone 6-7 usually June 1st) plant seed 1/2" deep and a minimum of 12" apart and then top with a light dusting of compost. These are low maintenance and require nothing else other than weekly watering. Don't pinch like branching sunflowers as they are single stem. Unlike other sunflowers we sell you will get the best results if you use a slow release fertilizer, or top with compost monthly, as they use a lot of nutrients as they grow. We don't recommend you start sunflowers early in pots as they send a large tap root when germinating and in pots less than 6" deep will quickly become rootbound and not develop correctly.

The overall vigor of the plant, is very dependent on sufficient soil nutrient levels. To achieve the tallest sunflower possible we suggest you use a nutrient soil test to check your NPK and make sure your PH level is as close to 7 as possible. Additionally these sunflower are very top heavy and if you live in a windy area you might need to stake the sunflowers until the plant stalk becomes a sufficient diameter to support the flower.

Initially the sunflower makes a single large flower (photo 2) and once the plant goes to seed the flower head will expand to a diameter of approximately 12" to 16" (photo3).