Red Rocket Radish
Raphanus sativus 'Red Rocket'
The crop that teaches you succession sowing, because it is finished before you have decided what to do with the bed.

Sowing
Direct sow only. Radishes resent transplanting and will bolt or go all-top if their taproot is disturbed. Sow half an inch deep, an inch apart, and sow a short row every ten to fourteen days rather than one long row once - a single sowing gives you thirty radishes in one week and nothing after.
The two failure modes
All leaves and no root means too much nitrogen or too little light. Hot, woody, split roots mean it sat too long or dried out and then got watered hard. Even moisture is the whole game, and radishes are shallow-rooted enough that two dry days matter.
Thin early
Crowded radishes make leaves instead of roots. Thin to a full inch within a week of emergence - later than that and you disturb the ones you are keeping. The thinnings are edible as microgreens.
Soil
Loose, stone-free, moderately fertile. Fresh manure or heavy nitrogen gives lush tops and no root. Any obstruction forks the root, and at twenty-two days there is no time to recover from a bad start.
Heat
Above about 80F they bolt and turn acrid. Stop sowing when nights stay warm, then start again eight weeks before first frost. Fall radishes are noticeably sweeter, larger and less prone to pithiness because they size up in cooling weather.
Flea beetles
The main pest, peppering the leaves with shot-holes. It rarely stops a root crop from sizing up, but heavy pressure on seedlings can. Floating row cover from the day of sowing costs nothing - there is no pollination to worry about - and is the clean answer. Cabbage root maggot occasionally tunnels the roots.
Harvest on time
Pull at three-quarters to one inch across, at twenty-two to twenty-five days. Left even a few days past that they go pithy and hot. Check by scraping soil from a shoulder rather than guessing.
Storage and the tops
Twist the tops off immediately or they draw moisture from the root. They keep one to two weeks refrigerated in a bag. The greens are edible - peppery and slightly bristly, best wilted or made into soup - and bolted plants produce edible seed pods that are excellent raw or pickled.
- Days to harvest
- 22-25
- Sow depth
- 1/2 in
- Spacing
- 1 in
- Row spacing
- 6 in
- Soil temp
- 45-75F
- Season
- Spring / fall
We sell this one.
See it in the shop