Jen Fulkerson wrote:My thought was the weather. I have grown radishes year round in N. California, zone 9b, but once it gets hot, so do the radishes. In the summer I just throw a few seeds to be a beneficial, because they are to hot to enjoy.
Roy Long wrote:Radishes grow at an exponential rate, I would say your radishes are looking great for how long they have been growing.
Keep in mind the 25 to 30 day grow time is based upon a fairly small immature root you can easily allow them to grow and extra 2 or 3 weeks to get a better sized root crop. You also have to keep in mind that cold overnight lows will slow the growth rate down a bit but when it warms up a bit in a week or two you will see a much faster growth rate. Radish plants can grow a radish root at an amazingly fast rate of speed.
I have grown a lot of radishes here as they are very cold tolerant and I have always had good luck with them. I plant mine good and early Jan-February direct seed sow and I am generally collecting radishes by early May and through to early June. We often still have overnight freezing in April but often warm up considerably in May sometimes up into the 70's and 80's which tends to make my radishes bolt. About half the years that I plant them I get few radishes to eat. I learned about 12 years ago that you can allow them to flower and go to seed and then collect basket fulls of the seed pods from them and eat those instead of the radishes. Not only do they make a very pretty addition to your garden with lots and lots of showy flowers the little seed pods are quite tasty.
The seed pods are kind of like a snow pea/stringless green bean in texture with a mild sweet peppery radish flavor to them. They are a very popular bar snack in Germany which is where I learned about the idea originally. I like the fact that I can literally get a small basket full per plant rather than just one singular small radish root. Anymore I eat most of them as radishes and then I leave a couple radish plants every square foot or so and then they grow into big 4 to 5 foot tall bushy plants covered in a thousand or more flowers each. I find the early radish flowers tend to be a favorite with bees and so I always make sure to grow some near and often in with my zucchini, squash, pumpkin and melons to help bring in the bees for better pollination.