My knockout roses have some yellow leaves and I am not sure if I am over watering them.
If the yellow leaves are towards the bottom of the bushes or are close in to the center, it is normal. The bushes other foliage tends to shadow those leaves and thus the bush really does not need them and lets them die back. If there are dogs in your area, they could be doing their pee business on them too. I have had that happen to some of mine and lost all the leaves on one side of the bushes!! Washed the area down and kept it watered well plus put some dog deterant around and the foliage did return.
I bought several double knock-out roses last year. They are doing well exept this year something is leaving holes in the leaves. It's still sending out new shoots, but they also have holes in the leaves. Help.
If the holes in the leaves look more like clean half moon shaped cut outs, then it could be what is known as a cutter bee. They use the rose leave foliage to make their little nests. Since they are very beneficial to us, I would just leave things be and they will stop eventually. Plus, they usually will not harm the bush's health. However, if they are more round or oblong holes, it could be a caterpillar or some other not so good bug. I recommend spraying the rose bushes down with Ortho Bug B Gon Max in that case. Two sprayings may be needed to gain control. Don't spray during the heat of the day. Spray in the early morning or later in the day when the temps have cooled.
We planted 6 knock out roses in April of 2010. They bloomed during the 2010 season, but not what I expected. They have bloomed one time early in 2011 and have not bloomed since. We were told to plant them and water them, but that they did not need anything else. I have started feeding them with Miracle gro in the last week . . . I thought that would be better than nothing. Four of the plants have good foilage, but something stripped the leaves from 2 of the plants several weeks ago. I live in east Texas. Thanks for your input.
this may help as well:
This is a good link for you. I think whoever told you to just "plant them" might have misled you. Organic materials mixed in to our natives soils are necessary for best results. They need deep watering, not just a hit with a hose.
One of my many knockout roses is getting leggy and losing yellow, discolored leaves. It's been really hot here but the others are doing well. Is it not enough water or a pest?
Roses need regular deep watering, even the Knockout's which are tough shrub types. What appears to be happening is the roses are getting stressed from the high temps and need more water. You may also be dealing with insect problems, since the plants become more susceptible to insect damage once their stressed. Hopefully this article can help:
Is it normal for double knock out roses blooms to fade and not fall off? I have to cut them off.
Yes, you do have to deadhead roses. All roses behave this way. By trimming the dead heads, you keep your plants healthier, and encourage further bloom. Roses need 1 side dressing of compost/fertilizer per month during the growing season, for steady bloom.
Should brown leaves on these roses be cut off?
Yes. Just to be safe, put them in the garbage and not in a recycling container or compost pile. Pick up any dead leaves under the roses, as well.
We planted four knock out rose bushes in full sun about two week ago. I have noticed that some of the aves are turning yellow. Am I watering too much or not enough? It's very hot here in GA.
Were these in a protected area when they were for sale? If they received very filtered light or were under cover, they are probably having trouble adjusting to full sun (I assume that is where they are planted). I think when it is this hot, it is hard to overwater them. Stick your finger down in the soil to test - it should be moist but not soggy.