Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Brassicaceae
Native
Unknown
Life Cycle
Annual
Plant Height
Short (Under 12")
Further Information
Plant Characteristics
Good for Containers
Growing Conditions
Frost Tolerant
About Radish
Raphanus sativus
1 ½"–2" globe-shaped root with red skin and white interior; mild flavor.
Planting Radish
Plant Spacing
A group of 3 seeds every 3"
Light Required
Full sun to part shade
Plant Height
Short (Under 12")
Planting Depth
½"
Coverage & Planting Details
| Coverage | This packet sows up to 48 feet. |
|---|---|
| Row Spacing | 12" |
| Seed Depth | ½" |
| Seed Spacing | A group of 3 seeds every 3" |
| Thinning | When 1" tall, thin to 3" apart |
| Germination | 5–10 days |
| Start Indoors | Not recommended; roots sensitive to disturbance. |
| Direct Sow | RECOMMENDED. 4 to 6 weeks before your average last frost date, and when soil temperature is above 40°F, ideally 65°–85°F. Successive Sowings: Every 1 to 2 weeks until late spring. Sow again in late summer until 4 weeks before your average first fall frost date. |
| Growing & Harvesting | Harvest when radish is no larger than 2" in diameter. If allowed to grow bigger, 'Crimson Giant' will get pithy and hot. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
Send Your Recommendation
Total 5 star reviews: 4 Total 4 star reviews: 1 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 1
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Rating
Which best describes you as a gardener?
8 reviews
- Lawrence H.Verified BuyerRated 5 out of 5 stars4/19/26Radish review
good germination rate and good sized radishes
Which best describes you as a gardener? ExpertBIBotanical Interests4/19/26Hey Lawrence,
We're so happy to hear your Crimson Giant Radish Seeds had great germination and are producing those nice big radishes! Crimson Giants are such fantastic radishes - they're known for getting impressively large while still staying tender and flavorful. There's nothing quite like pulling up those beautiful bright red radishes from your own garden! Sounds like you're going to have some delicious harvests ahead. Keep on growing 🌻️
- Gloria N.HI, United StatesVerified BuyerRated 5 out of 5 stars9/19/25Growing radish seeds...
radishes grew fast..so I could harvest sooner. Crispy, not spicey, Love radishes.
Which best describes you as a gardener? IntermediateWho do you grow for? FamiliesHow do you prefer to grow? Container - Violet J.Rated 4 out of 5 stars9/12/25These radishes grow so quickly! 😁😀
My radishes grew so quickly in this one spot it took up to 5 days! These might just be some of the most spicy radishes I have ever had!
Which best describes you as a gardener? IntermediateBIBotanical Interests9/15/25Hey Violet,
Thank you so much for taking the time to share your experience with our Crimson Giant Radish Seeds! We love that you got such quick results!
Radishes can really surprise you with how quickly they take off when they're happy. It sounds like yours developed some serious heat too! We hope your finding various ways to enjoy them. Keep on growing 🌻️ - ColeVerified BuyerRated 3 out of 5 stars7/22/243 Stars
Ok germination
- Perry S.Verified BuyerRated 3 out of 5 stars11/18/233 Stars
Did not produce radishes for me
BIBotanical Interests11/21/23Hey Perry, It sounds like you had a really tough growing season. I hope you respond to the email we sent so we can "dig" a little deeper into this. When radishes do not form a bulb, generally there is something else at play. Like most radishes, Crimson Giant produces best in cooler weather; growing these during the heat of the summer may result in little to no root development but will still produce greens. As we suggest on our packet, this one is best grown during the cooler months of the spring or fall, and it's a fast-grower that will typically produce a nice-sized radish in 28 days after germination. I hope that helps.