Sakurajima Mammoth Radish Seeds
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HCT DR
Sakurajima Mammoth Radish Seeds
This large Japanese radish needs more room and patience than a small salad radish. Sakurajima Mammoth is grown for its impressive round white roots, which can be sliced or cooked in the kitchen.
Packet: 50 seeds
Planting at a glance
- Season: Cool season
- Start: Direct sow
- Seed depth: ¼ inch
- Germination: Usually about 3–6 days in a mild, moist seedbed around 50–75°F
- Final spacing: Allow about 24 inches per plant and deep, loose soil
- Light: Full sun
- Harvest planning: A large winter radish needing months of cool-season growth; not a 20-day salad radish
When to plant
Sow in late summer or fall for a long cool growing season, adjusting to your local climate.
How to plant
- Prepare loose, well-drained soil or a clean seed-starting mix. Direct sow.
- Sow ¼ inch deep. Keep the seedbed evenly moist until seedlings emerge. Then water when the soil needs it, allowing excess water to drain.
- Thin or transplant to the listed final spacing. Give seedlings sufficient light and check moisture as roots establish.
How to harvest
Check root development and lift at the size and tenderness you want. Giant exhibition size takes more time and suitable conditions.
Aunt E’s tip: Give this giant a dedicated space rather than ordinary salad-radish spacing.
Growing notes
Timing is a planning range, not a guaranteed harvest date. Temperature, moisture, variety and season affect the result. Count from the sowing or transplanting point stated above.
Grow with Aunt E
Seed light and growing light: Cover these seeds at the depth on this listing; they do not need surface light to germinate. After sprouting, the leaves need good growing light.
Read the beginner growing guide · Compare the types and varieties · Get the germination instructions
Seed badges at a glance
- H
- Heirloom
- ★
- Hybrid
- OG
- Organic seed
- CT
- Cool season
- WS
- Warm season
- FS
- Full sun
- P
- Container friendly
- SS
- Small space
- CC
- Cut and come again
- FH
- Frequent harvest
- LG
- Needs light to germinate
- SP
- Spicy / hot
More seed codes
- IN
- Start indoors
- SH
- Partial or afternoon shade
- ST
- Support or trellis helpful
- D
- Dwarf
- B
- Bush habit
- V
- Vining or climbing
- SV
- Shorter vines
- SF
- Small fruit
- LC
- Large container
- F
- Fast harvest
- FL
- Flowers
- PW
- Pollinator interest
- PL
- Check pollination needs
- MX
- Seed mix
- DR
- Deep root space
- WD
- Well-drained soil
- DL
- Daylength sensitive
- LS
- Long growing season
- TR
- Tree crop
CC means cut and come again; FH means frequent harvest. Follow the crop instructions for what to harvest and when. OG appears only for documented organic seed. Codes are shortcuts; product details explain growing needs.
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