Growing Radish

Raphanus sativas : Brassicaceae / the mustard or cabbage family

Jan F M A M J J A S O N Dec
P P P P P P P P P P P P

(Best months for growing Radish in Australia - sub-tropical regions)

  • P = Sow seed
  • Easy to grow. Sow in garden. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 8°C and 30°C. (Show °F/in)
  • Space plants: 3 - 5 cm apart
  • Harvest in 5-7 weeks.
  • Compatible with (can grow beside): Chervil, cress,lettuce, leeks, spinach, strawberries, tomatoes
  • Avoid growing close to: Hyssop, gherkins

Your comments and tips

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19 Apr 16, Daniel (Australia - temperate climate)
I am also using fresh radish with sushi instead of wasabi. Delicious!
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04 Apr 16, gaby (South Africa - Summer rainfall climate)
can i pickel radishes
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25 Mar 16, Susainable Susan (Australia - temperate climate)
I am wondering if you are able to make a paste like the horseradish paste you buy from the store but from the pink radishes as i have noticed that the flavour of my pink radish has a bite to it similar to that of the horseradish root. Meanwhile i will try to make it using my Grandmothers horseradish paste recipe and let you know how i go.
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16 Oct 15, Joe graham (Australia - temperate climate)
i left radish plants in garden last summer. they have kept growing. now they are a large twisted root with branches coming of them with small white flowers. i have noticed that there i a large amount of pods.on each plant. on closer inspection of the pods i have found that each pod i picked has 2 or 3 green seeds. if i pick the pods a this stage and dried them will i get viable seed. i would like to do this as i have kept this garden bed organic as much as i can. i cant stop the bees cross pollinating. but im still trying to keep it organic. Thanks for your help
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18 Jan 16, Erika Semenoff (Australia - temperate climate)
Try and wait until the pods are dried. I did this with a few plants and had more seeds for next year than I knew what to do with :)
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19 Aug 15, robyn hamilton (Australia - arid climate)
I came back from 5 weeks in europe with too much weight on. My winter crop of radish had matured and I added to eveything I cooked. I lost 6 kilos in 7 weeks, but I did eat baby spinach, little cucumbers all mixed in a greek salad at each meal with fetta cheese and apple vinegar and sesame oil dressing. Have I found the great weight loss? Or, is it the very small meals with meat and veg?
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28 Jul 15, Doug (Australia - sub-tropical climate)
Best fertilizer for radishes
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06 Jun 15, Dhan chhetri (Australia - arid climate)
when to show red radish in melton vic 3338 australia?
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03 Jun 15, Jim (USA - Zone 5a climate)
Is June too late to plant radishes in Kansas City, MO?
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11 May 15, Janice (Australia - temperate climate)
Hi there, just thought I'll share this lovely winter radish citrus recipe which l discovered. Looks so delicious and some great info about radishes :) stirringchange.com/radish-citrus-salad/
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Showing 71 - 80 of 144 comments
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Your Black Spanish Radishes are a a winter variety - Germination (seed to seedling) happens at temps of 50f - 75f (10c - 24c) and will take 6 to 10 days. --they take anywhere from 30 to 70 days to mature (that is from sprouted seedling to harvest) - you can harvest them when they are about 3" to about 5". Plant anywhere from about two months before the first expected fall frost to 3 weeks before the first expected fall frost. Your best option is to figure out your first expected frost date - count back 8 weeks and call that your "expected planting date" - then check LAST years temperatures at or around your "expected planting date" -- if the temperatures sync up with the germination temperatures (10c - 24c) for Black Spanish Radishes, then it is a good time to plant, if not try and tweak your "expected planting date" so you will have the correct germination temperatures - and enough time for your radishes to grow. The reason your days to harvest has such a wide range is: you can harvest from 3" up to 5" -- additionally, when planting closer to fall/winter the number of hours of sunlight (and the intensity) varies a lot - for example: in my area on August 10th I get 14:36:05 hours of daylight .... and on September 30th I get 11:43:20 hours of daylight -- both are fairly good planting dates with August 10, 2022 having temps of (high/low) 20.4c/ 12.8c AND September 30th having temps highs of 20.4c and lows of 8.7c ==> but September has about 20% less daylight hours and the suns intensity is much weaker -- this means radishes planted in September will take longer to grow and mature than radishes planted in August.

- Celeste Archer

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This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. Gardenate is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
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