03-13-2010, 11:31 AM
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The easiest with Echinodorus bleherae
is to grow them emersed as bog plants. The roots are planted in sand, soil or gravel and kept permanently wet, but the leaves will grow emersed in air, and a cover over the tank will keep it moist and warm in most rooms. Nutrients will have to be added to the substrate, if sand or gravel, as root tabs/sticks. Soil or an enriched plant substrate would probably be reasonably sufficient but added nutrients might still be necessary. This is how these plants all grow in nature, though E. bleherae does "prefer" an aquatic environment.
Of course the leaf growth will be the emersed form, but that makes no difference. Once planted in an aquarium (yours, someone else's...) it will revert to the submersed form. All nurseries grow E. bleherae this way.