I have had another disappointing season with beets. I direct-planted Detroit Dark Red and Early Wonder in a square foot bed with lots of amended soil for the past 3 years and have gotten mostly leaves, no roots to speak of. The only possible drawback I can think of is that the bed does not receive early morning sun, but it does get sun for 6+ hours in the summer.
In reading sources on the internet I see two distinctly different types planting advice:
A) Sow indoors 4-6 weeks before last frost and, transplant out 12 inches apart at last frost date.
B) Direct sow outside "when frost infrequent", another says "2-3 weeks before last frost".
Which do you recommend?
One source says sow every 2 weeks til August, but another says sow one fall crop in July.
What method has worked for you with beets (I am in zone 6) and what varieties do you recommend for foolproof root crops?