nutritional status nor sufficiency ranges of herbaceous perennials grown by commercial operations in soilless substrates. Little attention has been given to identifying nutrient requirements and nutritional status of container-grown plants as related to plant
) to either determine nutrient status or target and identify nutritional disorders ( Owen and Whipker, 2020 ). Results of leaf tissue analyses can be compared with known species-specific nutritional leaf tissue sufficiency ranges and standards ( Bryson
arboretums, thus providing a wide variability of recommended nutrient levels ( Owen, 2019 ). Therefore, these nutritional standards do not accurately represent the nutritional status nor sufficiency ranges of the genera Heuchera grown by commercial
nutritional status of the plant ( Hallmark and Beverly, 1991 ). Tissue analysis is often compared with critical values, or sufficiency ranges, which are very sensitive to the plant’s developmental stage and nutrient interactions ( Stark et al., 1973 ; Sumner
cultivar are not very well established in 2021 ( Bryson et al., 2014 ). Most of the muscadine production guides, for instance, do not provide tissue nutrient sufficiency ranges ( Andersen et al., 2018 ; Cline, 2020 ; Krewer and Myers, 2009 ; Stafne, 2016
recent years ( Breschini and Hartz, 2002 ; Hartz et al., 2000 ; Johnstone et al., 2005 ). This research called into question the validity of the plant tissue nutrient sufficiency ranges currently used by the industry (Lorenz and Tyler, 1983 : Ludwick
distribution at stages 3–5. DRIS blade N, P, and K optimum ranges were compared with previously published sufficiency ranges ( Table 2 ). Given the stability of blade nutrient concentrations throughout the main fruit harvest period (stages 3–5), only values for
account for interactions between nutrients that DRIS provides. Therefore, nutrient imbalances or interactions that may affect plant performance are not considered in the interpretation. Sufficiency ranges may vary depending on species, growth stage, and
status, as compared with published sufficiency levels ( Bolda et al., 2012 ; Bushway et al., 2008 ; Hart et al., 2006a ), coupled with observations of plant growth and yield are presently used to develop nutrient management programs in all caneberry
nutrients in August when plants were unfertilized. Leaf P levels were at the low end of the current sufficiency range at both sites, with ‘Bluecrop’ and ‘Aurora’ having the highest leaf P. While leaf P was just below the lower end of the sufficiency range