Sunflower Planting Calculator
Sunflower seed ounces and jars from stalk count.
What it does
Mammoth sunflowers pay in seed weight. Big heads dry hundreds of striped seeds each for snacks and birds.
The tool above multiplies stalks by four ounces. Twenty stalks give 80 oz in 5 jars. The metric match is 2268 g with 4.5 jars.
Four ounces fits dried mammoth heads. Cut flowers trail far behind, with variety and water setting real weights.
Harvest hangs heads down. A foot of stem in a dry shed loosens seeds for rubbing into buckets.
Birds tax standing heads. Bagging blooms or cutting early saves the crop for jars.
How to use
- Pick imperial (oz) or metric (g).
- Enter stalk count.
- Read seeds first.
- Read per stalk next.
- Read jars and dry heads hung.
Formula
- stalks
- Stalk count.
Metric runs 113 g per stalk with 500 g jars. Four ounces per head suits mammoth types.
Worked example
Example: 20 stalks
Imperial defaults: 20 stalks. These are also the default values, so the page opens on this answer.
- Stalks: 20 mammoth sunflowers.
- Each: 4 oz of seed per head.
- Total: 20 x 4 = 80 oz.
- Jars: 80 / 16 = 5 jars.
- Tool shows 80 oz seeds, 4 oz per stalk, 5 jars (1 lb).
Reference table
| Stalks | Seeds | Jars |
|---|---|---|
| 10 | 40 oz | 2.5 jars (1 lb) |
| 20 | 80 oz | 5 jars (1 lb) |
| 50 | 200 oz | 12.5 jars (1 lb) |
Limits
- Yield guide only. Variety rules heads.
- Birds take unprotected crops.
- Wet falls mold hanging heads.
- Roasting needs recipes.
Common mistakes
- Leaving heads for birds.
- Drying in damp piles.
- Small flower types for seed.
- No rotation against mildew.
- Jarring damp seed that molds.
Try it yourself
Quick checks. Answers sit tucked under each question.
10 stalks?
10 x 4 = 40 oz. Jars are 40 / 16 = 2.5 jars, shown as 2.5 jars (1 lb).
50 stalks?
50 x 4 = 200 oz. Jars are 200 / 16 = 12.5 jars.
Questions
Seeds from 20 stalks?
Multiply stalks by 4 oz. Here 20 x 4 = 80 oz.
Seeds per head?
Near 4 oz (113 g) per dried mammoth head in this plan.
Storage jars?
Divide ounces by 16. Here 80 / 16 = 5 jars.
How do I harvest?
Cut heads with a foot of stem and hang dry. Seeds loosen with rubbing.
Bird pressure?
Yes. Birds claim standing heads fast, so bag or cut early.
Roasting included?
No. Roasting salt needs recipes.