Here’s ZiggyD’s guide:
The answer, naturally, is it depends. As Ziggy’sd video points out, there’s really two sorts of life energy. There’s the energy you get from a specific harvest, and it is what you use to craft and make new harvest gear. this energy is temporary; you’ll either spend it all right then or condense it. Condensed energy can only be used to fuel growth, which becomes important when you start doing T2+ seeds, as they will require condensed energy from the other seed types.
So condensing it doesn’t hurt. But if all you have is your harvester, the condensed energy goes to waste. So I think getting some storage units built for each color is pretty important, as they can hold 300 condensed energy. They take 75 life energy, which is easily accomplished from a full harvest.
The final structure allows you to store crafts, which sounds very cool. It costs 1800 life energy, which seems like a lot but can be achieved from a non full (but probably 70-80% full) T2 harvest, I believe. T1’s give like 7 life energy base, T2s 40 or 60 (can’t recall), and the higher level it is the more energy you get but I don’t know specifics. T3’s give like 200+.
The goal is to accumulate and harvest t1 stuff, get extra structures and the occasional gear craft, and accumulate T2 seeds so you can start harvesting those. It’s more complex due to the growth requirements - you’ll need condensed energy fed into those t2 seeds - but not too bad. The video includes a link to some visual guides on setting things up.
Note that you can reclaim planted seeds at the cost of losing growth and any condensed energy that contributed to that growth, where applicable. If you pick up a building, it keeps what ever energy it had on hand where applicable. E.g. if you need to move a full storage it remembers it had 300 condensed energy and it’s waiting for you when you put it back down.
So, apparently there’s some level restriction where if you are in zones beyond some threshold below a current level seed, they will not grow when the pod is harvested. Don’t think the mechanics are known yet. I don’t know if the seed storage is account wide, assuming yes. So yes saving some won’t hurt. But I’m not sure it’s super important. Your brand new character wouldn’t be able to grow high level plants. If the garden is account wide, it does mean you could store choice high level crafts for your alt to leverage of course.