Return to the Roses Forum | Post a Follow-Up

 o
what's wrong with my bushes? With pics

Posted by newbie_ca So. CA (My Page) on
Mon, Jun 11, 12 at 15:28

hi all, this is a follow-up on a previous post (and thanks to members roseseek, harmonyp, kathy9norcal, kippy-the-hippy, dublinbay for their answers, they were much appreciated!)

I wanted to post again with some pictures so you guys could take a look. For those who didn't read the first post (about 2 weeks ago), this is the background:

- location = Palm Springs, CA - soil = desert-like, lots of sun, and plenty of water (daily drip irrigation), hard water. I don't really know about the soil quality, of whether the gardener prepared it correctly when the bushes were planted

- have 10 bushes, half at least 4 years old, half is about 1 year

- only 2 bushes are doing fine, but many of the others are not so good. Basically the problems are:

1) tiny rose buds shooting right off the base, or tiny scrawny multiple buds blooming fast

2) multiple canes looking weak, pencil-like. How many canes should I keep on each bush? and how long should they be? 2 to 3 feet?

3) every time I deadhead, the next bud growing at that spot is smaller than the previous, with a smaller flower

4) how long does it typically take for a new bush to grow into thick/dense canes + foliage? several years?

I don't know hwo to proceed ... should I just leave it alone? should I keep pruning throughout the summer? I'm really frustrated over this, especially when I see the neighbors' beautiful bushes!

My pics are here:

https://www.dropbox.com/sh/1lmii0baq0w3bpc/GU8gW-4AC2

Sorry I couldn't figure out why the pics are rotated on DropBox, they look fine on my computer.

Thank you for any help or ideas/tips!

Gil
gmont66 at yahoo


Follow-Up Postings:

 o
RE: what's wrong with my bushes? With pics

I'm not familiar with using stone mulch, so I'm just guessing, but I wonder if the stone mulch can block and prevent the rose from sending up new canes from the base...?


 o
RE: what's wrong with my bushes? With pics

  • Posted by hoovb z9 Southern CA (My Page) on
    Mon, Jun 11, 12 at 17:05

One thing you need to take into account is that Palm Springs is a challenging place to grow roses. It's desert. Your roses will probably be at their best in winter, and mostly dormant from now until October, once they figure out where they are. They will also be slower to develop and establish than roses in milder climates, because they will completely shut down and go into survival mode until it cools off in autumn.

I'd replace the gravel with a thick (3"-4") mulch of compost or bark. Keep the mulch a couple of inches away from the base of the plant. That will cool the soil somewhat and help them deal with the heat. It also holds in moisture so you don't have to water quite so much. Over time it also significantly improves the soil and offsets the high pH water somewhat as well.

Also, you may be over watering. Roses love water but don't want to be drowned either. If all the tiny spaces between soil particles is filled with water, without any spaces left for oxygen, the plant roots can suffocate. Roots need oxygen, not just water.

You don't say what you fertilize with or how much or when you did it. That would be helpful to know.

Long term, take an interest in and get to know desert plants more appropriate to your climate. You will have an easier time of it, and they are as beautiful in their own way as roses.


 o
RE: what's wrong with my bushes? With pics

Descanso Gardens DESTROYED their Rose History Walk with stone mulch. Stone is a solar collector. It gets HOT quickly and remains HOT for a long time, not only baking the soil and all living material in it, but continuing to radiate that heat for a very long time. It is nearly the same thing as planting it in a clay pot and putting it in the hot, direct sun. The roots and tops cook, fry, bake. The plants go into survival mode instead of growing and flowering. As they try pushing new growth without enough foliage mass to support themselves, they get smaller and smaller until they shrink back to nothing. Stone mulches are used in hot, dry areas to prevent weed growth. They sterilize the soil by cooking anything which tries to grow. Heated bricks are used as bed warmers in very cold climates. Hot rocks can actually be put in pots of water to heat it. That heat is transmitted into the soil where it can literally kill the roots of the plants. Great for preventing weeds and eliminating maintenance, but not for encouraging plants to grow.

I know there isn't a lot you can do about it, but your roses are all too close to that stucco wall. If there is any direct sun on the way, it gets HOT, radiating that heat around the plants and cooking the water out of them. The stone mulch heats up also, and that cooks out the water. Replace the stone mulch with something organic: planting mix, shredded cedar, something which holds water and does not heat up to become a source of solar heat. Feeder roots are very close to the surface of the soil. Hot surface temps cook the plants' digestive tract. Get rid of the stones and replace them with something organic.

I would NOT prune those plants, period. Do not cut off any wood unless it is dead or obviously dying. There are stored nutrients in it and those plants need them to survive and, hopefully, rebound. Personally, I would not permit them to flower for the rest of this year. They will continue trying to flower (ovulate) trying to reproduce before they die to perpetuate the species. Pinch off the flower buds but leave all the foliage and wood on the plants. Force them to grow and use all the resources they have to grow.

You want available moisture, not mud. See how moist the soil remains once you've replaced the rocks with an organic mulch and adjust your watering accordingly. I have no idea how sandy or compacted the soil in those planters is, so can make no suggestion for how much, how long or how frequently to water. You're going to have to accomplish this one by observation and trial and error. If it's compacted clay as around much new construction, it will require less water. If it's sandy back fill from older construction, you'll need much more.

The plants look the way they do because they have been continually baked, tops and roots. They are alive probably because of all the water you've applied. Providing them with a much more suitable root environment; encouraging them to produce foliage and canes instead of flowers until they have enough foliage mass to actually shade themselves and provide the food production they need, with enough storage capacity in the canes for any excess, will go far toward getting them to appear and perform as you expect.

I am concerned about how hot that wall behind them can get. I had a customer who lives in Agua Dulce, fairly high desert, who reported on a hundred degree day, he measured 130 degrees reflected heat, one foot away from his white stucco wall. Saguaro cactus will tolerate those temps, but NOT their roots and not roses! Kim


 o
RE: what's wrong with my bushes? With pics

  • Posted by seil z6b MI (My Page) on
    Mon, Jun 11, 12 at 20:22

Kim said what I was thinking. In your climate that stone is going to be way too hot and will reflect that heat up into the roses. They're cooking!

You've gotten good info and advice from everyone here. Follow it and they should do better for you.


 o
RE: what's wrong with my bushes? With pics

My boss recently planted roses and used stone mulch. I told him the same thing that Kim said. We aren't in a desert, but it gets very hot here.

I only put stones down where I don't want anything to grow.


 o
RE: what's wrong with my bushes? With pics

Kim's exactly right.
You can buy a nice bark mulch at Home Depot. Remove ALL of the rock. Pile on the mulch.
Water regularly.

Can't say how much, or how often, because there is a lot we don't know. You might try contacting a local Consulting Rosarian. I don't find a listing anymore for Palm Springs Rose Society, but I do find one for La Quinta. (See below.) Note that some of these listings may be nastily out of date, but try several, and you should likely find one.

Jeri
Coastal Ventura Co., SoCal

Here is a link that might be useful: La Quinta Rose Society Consulting Rosarians


 o
RE: what's wrong with my bushes? With pics

I'm in Illinois, where it hits 90 regularly, and our house has light-colored siding. The south side of the house receives sunlight all day. The thermometer in the bed will top out at 120 by noon and remain there until 6pm.

The previous owners had used river rock mulch on all 4 sides of the house. Nothing we planted would survive, and we eventually had to remove it all. There was over 6 tons of it on the property and if you want to see me have a holy fit, just mention using rock as mulch within earshot.

Not only does it bake the bejeezus out of your plants, it provides a double-whammy of compacting the soil underfoot as you step into your planted beds to work them.


 o
RE: what's wrong with my bushes? With pics

What Kim said. Take the rock off! I grow many roses in a similar climate (Phoenix area) and rock is the kiss of death! If the roses are well-mulched (not rock!), they will do fine here. One of my pet peeves is the horrible rock people put everywhere around here. It just makes it hot hot hotter! Give the roses plenty of good organic mulch and some shade, if possible, in the summer, and of course water. I use leaves from my yard as mulch (even oleander leaves) and it is cheap and works great.

Get rid of the rock!(did I already say that)...


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Roses Forum

Instructions

  • You must be a registered member and logged in to post messages on our forums.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • It is illegal to post copyrighted material without the owner's consent.
  • HTML codes are allowed in the message field only.
  • No advertising is allowed in any of the forums.
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.



 
Click here to learn more about in-text links on this page.