If you have hex, poser or Bryce you can convert these 3ds models to objs. They are individual plants but with DAZ’s instancing you could get your rows of radishes and onions.
Radish by Daniel.
Spring onions by Veronica Bush.
Also www.plantit3d.com has some 3ds models of weeds that are in a row. They could be used for young seedlings. They also have some individual plants that from a distance might work for dill.
In the past I took the tea bush model from Xfrog and changed out the leaf from tea to cotton. So you might want to look in the library section of xfrog and check out the free samples. Each library bundle has one free sample and they are different then the ones listed on the sample page. You may be able to play with leaf types and get something close to what you want.
And finally in this package is a pumpkin vine. Might work for cucumbers, squash too.
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