Question
What is the difference between Larkspur and Delphinium? Is one more difficult or are they the same thing? And do you have any growing tips for them? I am an internmediate gardener. And I live in zone 7 1/2. (borderline 7-8)

Answer
I cannot say it better than Wikipedia.

What is Larkspur?

"The common name of two closely related plant genera Consolida and Delphinium in the family Ranunculaceae."

When gardeners I know talk about Larkspur, they are talking about "annual Delphiniums", purchasing Consolida seeds from Shepherd's Garden Seeds catalog.  Soil for these is slightly alkaline.  Their intense delphinium-blue flowers suggest they MUST be related to the Delphinium - but that is a different Genus.

Delphinium Hybrids are still The King of the Garden Border.  Breeders are producing ever bluer, bigger flowers.  New Zealand Hybrids have replaced the old but still-stunning Pacific Hybrids as THE Gold Standard for Dazzle.  Can you tell I love these?

Trouble is, they don't bloom for more than 2 weeks.  And they do need serious staking.  The kind that you have to check daily to make sure it did not move down the stalk - or your flowers will be history.  And believe me, there is nothing sadder than a Delphinium lost due to too much wind.

You can order Seeds for both from Renee's (https://www.reneesgarden.com/about/reneebio.htm).  Graceful Gardens (www.gracefulgardens.com) sells the NZ Delphinium plants.  They are so worth the trouble.

Good luck.