I've got a few plants, like the Fabled Fern, which don't seem to respond any better to bio-organic soil and filtered water than they do to the ordinary stuff. Other than hitting them with insta-grow formula to beat out the loss of health, how do you keep the things alive? It's not as though they're especially rare plants that should require the Isola ingredients.

Many of the hybrid species of plants do require the best soil in order to thrive. I'm not sure how you determined that the Fabled Fern should grow in the "blue soil," but if a plant is losing health, it is too rare for the soil that you're using. The only way to keep the rarer plants in full health is to wait to grow them until you have the Soil from Isola.

Nevermind. The excellent seed catalog by sfose, available as a PDF file from the Plant Tycoon Guide area of this site (evidently since yesterday!), explains it all. Many thanks to sfose!

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We evidently cross-posted. Thanks for the information, in any case!

Yes, I added that to the Guide Section yesterday. It's a good idea to check it periodically, as things will certainly be added as fans create nifty, new things to put in there.

You're welcome.