Undesized beets in raised bed

Question

I made raised beds and filled them with Kelloggs raised bed mix about 5 months ago.
Have about an inch of mushroom compost on the very bottom.
(I have seen some thin spindly mushroom stems come up but fall over in a day).
PLanted Brocolli, cauliflower, lettuce, beets and radish.
I live in zone 23-24 (s calif near coast).
The beets show good foliage but the root is about the size of a marble.
Brocolli and cauliflower only sprout an inch or so then nothing else.
I apply an 8-8-8 organic fertilizer once a month
They get burbler water 4x each day for one min each time.
Ground is moist 1/2 inch down.
So disappointed Im thinking about giving up on veg gardening
What could I possibly be doing wrong?
Bob Sankey
858 229 8753
[e-mail]

Answer 1

The cause of this is usually a lack of phosphorus in the soil. Too much nitrogen in the soil can do this as well. Here is a link for more information: https://www.gardeningknowhow.com/edible/vegetables/beets/beets-small-or-deformed.htm