Abstract
Application of plant biostimulants to various crops has enhanced yields and increased growth. This study was conducted to determine the effect of plant biostimulants on growth of Hemerocallis × `Aztec Gold'. Roots of single-plant divisions were immersed for 5 min in solutions of 520 ppm KELPAK (seaweed concentrate), 390 ppm PGR IV (hormone concentrate containing nutrients), 250 ppm AGRI-GRO (contains dormant nitrogen-fixing bacteria) + 250 ppm molasses, or water prior to planting on 20 April 1992. Plants were grown in 3.8-liter containers under 31% shade. Foliar sprays (to wet) of these biostimulants (same concentrations as before) were applied on 20 May, 19 June, and 13 August 1992. Plants were harvested on 21 October 1992. None of the biostimulants affected final plant height, number of divisions, or shoot and root fresh and dry weights. However, plants treated with KELPAK had higher shoot to root ratios (fresh and dry weight) compared to the control.
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