Growing Radish

Raphanus sativas : Brassicaceae / the mustard or cabbage family

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
		P	P	P			P

(Best months for growing Radish in USA - Zone 5a 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 46°F and 86°F. (Show °C/cm)
Space plants: 1 - 2 inches 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

29 Jun 21, Anon (Australia - sub-tropical climate): They are talking about planting radish with other seeds to mark the row. Like a couple of radish between two lettuce seeds/plants. Radish will germinate in 2-5 days to show where the others are planted. I suggest you do a thin line of radish.by itself. Plant the other seeds in a different row. What I do now is have soil nice and fine and level, pat it down a bit., then plant seeds in a thin row - pinch a few seeds in your fingers and wriggle your fingers to release a seed or two at a time. Then cover the seeds with seed raising mix or fine potting mix. Try and keep the seeds shaded until they germinate. Keep the plant area moist all the time.
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02 Oct 21, Selina (Australia - temperate climate): This is great advice for a beginner. Thanks.
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12 Dec 20, Vanessa (USA - Zone 10b climate): My baby sprouts were devoured in my raised bed, despite using bird netting. No bugs visible. What could it be??? So bummed.
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14 Dec 20, (USA - Zone 3a climate): You may have to go out at night to see what eats them. Could be snails or worms etc. If you can buy it, try some veggie netting.
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24 Nov 20, Sarah Browne (South Africa - Semi-arid climate): Someone is eating my radish leaves. Tiny pinprick holes. Any advice?
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25 Sep 20, Dennis Naidoo (South Africa - Summer rainfall climate): Hi I planted bell peppers tomatoes and brinjals They are flowering and some peppers and tomatoes are showing some fruit. What fertlizer can i use to increase fruit Dennis
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05 Oct 20, Nick Baxendale (South Africa - Summer rainfall climate): Hi Dennis, I use borax, dilute one tablespoon in four litres of water and spray plants when they start to flower, worked like a bomb on my brinjal plants, they also like calcium, take egg shells wash them and then crush into jar of water let stand for a couple of days them treat brinjal plants by pouring water into soil. Please don't forget to wash shells first otherwise you will have a hell of a stink, like my first time. Cheers Nick
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27 Sep 20, (South Africa - Semi-arid climate): A general fertiliser will do. If you start with good rich soil then you really don't need to fertilise again.
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31 Aug 20, Kishinchand Chellaram (Australia - temperate climate): HI, I planet white radish , the laves where the green leaves where long and well but the radish was very thin like a stick very thin . so what is the reason? thanks
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03 Sep 20, Anonymous (Australia - sub-tropical climate): I have grown Daiken and White Hailstone radishes the last couple of years and find they have a far bigger leaf top. As mentioned too much nitrogen probably. In the tropics and sub tropics more a autumn winter crop. Too much shade and they will not grow very well. A picket fence (on the north side of the garden) shading my radishes is enough to stop them from producing a crop.
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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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Growing Radish

Raphanus sativas : Brassicaceae / the mustard or cabbage family

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Raphanus sativas : Brassicaceae / the mustard or cabbage family

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