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Enhance the Grouth and Flowering of Roses (Rosa Galica L.) Due to Composted Waste Coffee Powder and Gibberellins Concentration

This  study  aims  to  determine  the  effect  of  composted  waste  coffee  powder  and  gibberellins concentration  on  the  growth  and  flowering  of  roses  (Rosa  galica  L.)  as  well  as  the  interaction between  the  two  factors.  Research  conducted  at  the  Experimental  Farm  of  the  Faculty  of Agriculture  Syiah  Kuala  University,  Banda  Aceh.  This  study  used  a  Randomized  Block  Design (RAK) in factorial arrangement; there are two factors with three replications. The first factor is composted waste coffee powder consisting of: soil + composted waste coffee powder (1:1), soil + composted waste coffee powder (1:2), sand + composted waste coffee powder (1:1), sand + composted  waste  coffee  powder  (1:2).  The  second  factor  is  the  concentration  of  gibberellins consisting  of:  0,  100,  200,  and  300  ppm.  The  results  showed  that  the  composition  of  the growing  media  composted  waste  coffee  powder  has  no  significant  effect  on  all  parameters observed.  Planting  media  composition  tends  to  be  better  found  in  sand  +  composted  waste coffee  powder  (1:1).  The  concentration  gibberellin  very  significant  effect  on  the  number  of branches  at  the  age  of  60  days  after  planting  (DAP),  significant  effect  on  plant  height,  stem diameter and number of rose plants flower, at the age of 45 and 60 DAP. The best growth and flowering of roses was found on concentration of 200 ppm gibberellin. There was no significant interaction  between  composted  waste  coffee  powder  with  gibberellin  concentration  on  all parameters observed