Variety field guide
What to expect from Mammoth Long Island Dill
Mammoth Long Island Dill is an annual dill selection grown for culinary leaves, flowers, or seed and succession planting.
Read the complete product descriptionTraits, flavor, garden use, variety notes, and the full catalog record
Mammoth Long Island Dill is best suited to pickling, cut foliage, beneficial-insect flowers, and seed harvest. Its defining kitchen character is fresh, grassy, anise-like dill aroma. These dill cultivars are long-circulating commercial selections.
About Mammoth Long Island Dill
Mammoth Long Island Dill is an annual selection of dill, with an upright/erect habit and an expected height or spread of 49–60 in. It is best suited to culinary leaves, flowers, or seed and succession planting. Notable traits include harvest leaves young or allow selected plants to mature seed according to use; aromatic flavor characteristic of the named herb.
Keep field notes on Mammoth Long Island Dill so its performance can be compared with other dill selections under the same planting date and care.
History and provenance
This crop belongs to the carrot family, a group with a long history in Eurasian and Mediterranean foodways. The family includes leaf, root, stem, spice, and seed crops, but their culinary traditions do not prove a specific commercial seed lot or breeder lineage. These dill cultivars are long-circulating commercial selections. Mammoth Long Island is grown for tall flower and seed production; Bouquet is valued for foliage and umbels. We do not treat seed-catalog repetition as proof of a precise origin date. We do not treat seed-catalog repetition as proof of a precise origin date.
Growing facts
| Scientific name | Anethum graveolens L. |
|---|---|
| Life cycle | Annual |
| Maturity | 70-79 Days |
| Germination | 7-14 Days at 55–70 °F |
| Seed depth | 1/4 in |
| Plant height / spread | 49–60 in |
| Growth habit | Upright/Erect |
| Spacing | 8 in between plants; 18 in between rows |
| Sunlight | Full sun |
| Soil | Loamy; pH 6.0–6.5 |
| Water | Moderate |
| Support | No-Support |
Starting Mammoth Long Island Dill from seed
Sow 1/4 in deep and keep the seed zone evenly moist. Expect emergence in 7-14 Days when the seed-zone temperature is near 55–70 °F. Germination preparation: Use a fine, evenly moist seed-starting mix or prepared seedbed. Light requirement: Cover evenly to 1/4 in. Soaking: None required. Stratification: None required. Scarification: None required.
Planting and care
Plant during spring and provide full sun. Space plants 8 in apart with 18 in between rows. Use loamy with a pH near 6.0–6.5, and follow a moderate watering plan. Support requirement: No-Support. Frost response: Semi-Hardy. Medium to large container or in-ground bed; avoid crowding
Harvest and use
Approximately 70-79 Days, from direct sowing to the primary leaf, flower, or seed harvest stage. Weather, soil temperature, and planting method can shift the actual harvest date. Harvest: Harvest leaves young or allow selected plants to mature seed according to use. Uses: Culinary leaves, flowers, or seed and succession planting. Flavor: aromatic flavor characteristic of the named herb. Seed saving: Insect-pollinated umbel crop. Best uses include culinary leaves, flowers, or seed and succession planting. Flavor and eating quality: aromatic flavor characteristic of the named herb.
Saving seed
Select several healthy, true-to-type Mammoth Long Island Dill plants that match the expected upright/erect habit and overall plant form. Avoid saving seed only from the earliest or largest individual unless that is your deliberate selection goal. Pollination system: Insect-pollinated umbel crop. Compatible plants of the same species can cross through insect activity; wild relatives matter for carrot and parsnip. Separate compatible varieties that may flower together, or use cages, barriers, hand pollination, or another documented control appropriate to the crop. Allow selected plants to pass the eating stage and reach full botanical seed maturity. Harvest only when seed heads, pods, or fruits have matured enough for sound seed development. Clean the seed carefully, dry it thoroughly away from direct heat, label the lot with variety and year, and store it cool, dark, and dry. Test germination before an important planting or distribution season.
Common problems
Common concerns: Carrot rust fly or root maggot where present, aphids, caterpillars, leaf spots, damping-off, and uneven emergence from crusted soil. Management: Use clean seedbeds, rotation, careful watering, prompt thinning, airflow, and locally appropriate exclusion methods. Diagnosis note: Similar symptoms can have different causes. Compare plants of the same age, record weather and irrigation, and use local Extension or diagnostic support before applying a control.
Frequently asked questions
Frequently Asked Questions - Mammoth Long Island Dill
When is Mammoth Long Island Dill ready? Use 70-79 Days. Approximately 70-79 Days, from direct sowing to the primary leaf, flower, or seed harvest stage. Weather, soil temperature, and planting method can shift the actual harvest date.
How long does germination take? Expect 7-14 Days at about 55–70 °F. Cooler, hotter, crusted, saturated, or dry seedbeds can slow emergence.
How large does it grow? Expect about 49–60 in with an upright/erect habit. Space plants 8 in apart and rows 18 in apart. Support: No-Support.
Can it grow in a container? Medium to large container or in-ground bed; avoid crowding Use a container with drainage and enough volume to maintain the listed spacing and steady moisture.
Can I save seed? Insect-pollinated umbel crop. Keep compatible varieties isolated and allow selected plants to reach full seed maturity.
