Imperator Carrot
Daucus carota subsp. sativus
The long tapering supermarket carrot, and it needs deep loose soil most gardens do not have.

Only grow it if you have the soil
Imperator roots run eight to ten inches with a fine taper, and they need that much deep, loose, sandy, stone-free ground. In average garden soil they fork, stunt and split. This is the type commercial growers use on sandy river-bottom fields, and it is the wrong choice for clay.
Or build a bed for them
A raised bed twelve to fourteen inches deep, filled with a light compost-and-sand mix and never walked on, grows excellent Imperators. That is a real project, but it is the reliable route.
Flavour is not the strong point
Imperators are bred for length, uniformity and shipping durability rather than sugar. They are perfectly good, but a Nantes grown alongside will taste noticeably better. Choose Imperator for looks and yield, Nantes for eating.
Germination and thinning
Slow, two to three weeks, surface kept damp throughout. Thin to two inches. Because the roots are long and fine, thinning late damages neighbours - do it early while seedlings are small.
Soil preparation matters more here
Double-dig or broadfork to at least twelve inches and remove every stone. Any obstruction at depth causes a fork, and with a long variety you will not see it until harvest.
No fresh manure, even water
Fresh manure causes forking and hairy roots. An inch of water a week, evenly - a heavy soaking after drought splits long roots badly.
Pests
Carrot rust fly tunnels the roots - insect mesh barrier or row cover from sowing. Green shoulders from light exposure; hill soil over the crowns.
Harvest and storage
Loosen deeply with a fork before pulling, or the roots snap and you lose the tip in the ground. Cut the tops off at once. Three to five months in damp cold storage.
- Days to harvest
- 75-85
- Root
- 8-10 in, long tapered
- Spacing
- 2 in
- Soil
- Deep, sandy, stone-free
- pH
- 6.0-6.8
- Core
- Distinct
- Storage
- 3-5 months
- Best for
- Sandy soil, deep beds