Why can't I grow tomatoes?

[Coopja]

I have a raised garden bed with good soil and compost. I've tried growing herbs and tomatoes in it but the tomates get flowers and they don't produce tomatoes. The flowers die and drop off.

I put a cover over the plant this year and the plant looks super healthy but again, flowers dropping off.

The garden is against the north facing 

Fence but there are tall trees next door that shade the sun for some part of the day.

Appreciate any assistance. Thanks

[Akanksha]

Readers of this popular discussion should check out this step-by-step guide on How to grow tomatoes from seed to harvest by experienced horticulturalist @Adam_W. It contains handy tips on how to keep tomato plants healthy and protected from common pests and diseases. 

Don't hesitate to reach out if you have any questions.

Akanksha