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Before each cut is made it is advisable to dip the pruning shears in a 1:10 chlorine bleach : water dilution . Obtaining a two-dimensional realization of surface current velocities would add greatly to the efficacy of marine forecasts , fish stock assessment ( Fiedler et al ., 1984 ) , vessel drift , search-and-rescue , and similar items requiring a knowledge of surface drifts . This material reacts much faster than elemental sulfur ( less than 1 month ) ; however , the cost is greater . When several plants are to be grown together , more satisfactory results will be obtained if an entire bed is prepared rather than digging holes for individual plants .