If you have both Growth Spurt and the Healthy crystal, which you get incredibly early, you can just keep popping out seeds at a fast pace, while also gaining hp every time you do only at the cost of mp, which can just be circumvented by refilling it at a bed or tent for free.

Also fairy gift, wealthy, etc.

if you also have the cow necklace (forgot its name) that reduces the mp cost of skills the growth skill only costs 3mp so you can really spam it