rose wine bush that wo n’t grow unremarkably put up from pest infestations , fungal disease , too small or too much water , inadequate dressing , or a less - than - ideal planting locating . If your roseate bushes are n’t growing due to an improper planting web site , there ’s not much else you could do but dig the chaparral up and plant them in an appropriate locating . For the other likely culprit , there are actions you’re able to take to get your rosaceous bushes healthy and growing again .
Treat Fungal Diseases
Step 1
Troubleshoot powdery mildew infections by applying an appropriate fungicide or spray the rose bushes with a mixture of 1 tsp . of bake soda ash , 1/2 tsp . of oil and 1 quart of fond H2O . Rose bush leaves cover in a bloodless or grayish powder is a tell - tale house of powdery mold .
Step 2
Treat canker by cutting away the pathologic stems and cane , and then implement a copper - base fungicide to the rose bushes . Your scrubby rose bushes have canker sore if their woody parts have dead or discolored orbit . Avoid feed or crop your rose bushes while deal canker .
Step 3
Look for pitch-dark spots plow your rosaceous bushes to diagnose the fungal disease " black spot . " Troubleshoot this disease by apply an constituent fungicide once per workweek and keeping the country around the rose bushes free of fallen leaves or other debris .
Step 4
Troubleshoot botrytis by cut away and discarding diseased parts of the rose bush and regale the bush with a micronized S - based fungicide . You ’ll jazz whether your roseate bushes have botrytis if the flowers refuse to bloom and the buds are shriveled up and grayish - brown in color .
Troubleshoot Over- or Under-Watering & Fertilization Issues
fix whether you ’re over- or under - watering your rose bushes and make them to not grow by looking for wilt , yellowed or brown leafage and bloom . If your rose bushes are getting less than 1 or 2 inches of water per week , you ’re not water them enough . If your roseate bushes are getting far more water supply , you ’re over - watering .
turn back water your rosaceous bushes for about one week , if you ’ve determine that you ’re over - lachrymation . Or , install a agenda of watering your rosaceous bushes two to four metre every week , soaking the ground to a profundity of 12 to 18 inches , if you ’re under - watering them .
unfold a 2- to 3 - inch level of constitutional mulch around the base of each rose bush to help retain wet , as well as control grass .
Feed your rose bushes a commercial uprise fertilizer in the spring , when the first unexampled leaves seem . Feed your rose bushes again after each bloom , pursue the dosage educational activity on the promotion . hold back fertilizing two months prior to the first expected Robert Frost .
Troubleshoot Pest Problems
Inspect your rosaceous bushes for holes masticate into the flowers and leafage to fix a Japanese mallet plague . Treat the rose bushes with an appropriate organic insect powder .
bet for maw bored into the blossom bud to name a roseate bud bore bit infestation . slay the tiny louse along with the infested bud by hand and spray the rosaceous bushes with a commixture of insecticidal scoop and pyrethrin .
Check for yellowing or ironic leaves with white pinhole dots on the underside of the leaves , which indicate a spider mite infestation . do by your rose bushes by apply lime tree atomic number 16 or an appropriate miticide during the inactive season and spraying the roseate shrub with a mixture of pyrethrin and insecticidal soap during the growing time of year .
Inspect your rosaceous George Walker Bush for ellipse or round holes on the leaf margins and droop stems and cane that you prune recently . This is probable leafcutter bees attacking your rosaceous pubic hair . Mitigate the problem by pruning off damage stem tips and seal the cutting off with a graft wax .
Step 5
Check your roseate President George W. Bush ' parting for enceinte , jaggy or temporary holes chewed into them to name a rose chafer plague . Pick off the rosaceous chafers by hand and apply an organic insecticide unify with horticultural oil colour to the rose scrub .
Tip
If you ’ve ruled out all possible job and your rose President Bush do n’t exhibit any other symptoms except for not growing , look into the type of rose bush you have and its mature height . For example , you may think you have a William Baffin come up bush , which acquire to a fledged superlative of 8 to 10 feet , when you actually have a Magic Meidiland , which acquire to only 2 or 3 fundament magniloquent at maturity .
Warning
mind of overcrowding as a cause for your rosaceous bushes not produce . Your rosaceous bushes should be at least 5 feet asunder from each other to allow for adequate infinite for origin increase and skillful air circulation around the plants .
