Q.
Hi, I have a rose that until January was flourishing then all of a sudden the leaves have started turning yellow and falling off (new and old alike). The buds aren't opening properly and when they do the roses have a shrivelled appearance. I have watered and fed regularly, and sprayed for diseases and insects. My rose is a Lasting Love standard beside a fence which I have tied to the fence for support. Any suggestions on what could be wrong with my bush? Thanks, Rachelle.
A.
This is die-back which can be caused by a number of things including black spot, mildew or rust. Die-back is a symptom of disease and not necessarily the cause. Cut away the infected branches to beyond the infected wood, make sure this is done on a dry sunny day. Seal the wounds to prevent disease entering the plant. Pick up any infected leaves that may have fallen around the rose to stop disease spreading. The disease could have been carried on dirty cutting tools, make sure they are clean by sterilising with methylated spirits so disease can't be spread to other plants. Try and stake the rose rather than tie it to the fence, as this will cause less damage to the rose. Spray with a spray suitable for fungal diseases on roses - check at your local garden centre.
Keep your rose well watered – deep watering every 3-5 days rather than light sprinklings of water and feed it during spring, summer and autumn with a specially blended rose fertiliser such as Tui Rose Food. Tui Sheep Pellets are also great for roses - they are sheep pellets and nitrophoska mixed together in a pellet so have the added benefit of improving the soil as well as feeding the rose.
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Why have the leaves on my rose suddenly turned yellow and fallen off? Comments
we have 2 standard roses bushes in garden which have been planted about 16 months/ last summer no problems but this year one has turned yellow and lost every leaf and now the other one is going the same. they have been watered regularly,been sprayed with black spot killer but look very sorry. could it be a problem in the soil and should I dig then up and put them in large pots
georgina swan
Thanks, hope anti-fungal works. New rose same as above one, just noticed yellow leaves around the base (in container.) LOTS of rain lately.
Ellen A. Goldstein
Rose leaf will turn yellow because it?s winter time.
Simon
Its late summer in NZ
Morton
Hi Georgina, roses require a free draining fertile soil in full sun in which to thrive. The symptoms your plants are showing indicate something isn?t right in the soil, more than likely drainage, lack of nutrients or not enough sun. If your plants are in full fun, suggest trying to remedy the problem by adding rose fertiliser to the soil then drenching the area with a seaweed tonic. In 3 to 6 months the plant should show signs of improving. If drainage is the issue, remedy that or transplant the roses into large pots. ^ Tui Team
gemma
My kafir lime tree in the pot has yellow leaves, I've given epsom salt and a product for yellowing leave, but they don't work. I wonder if I have to transfer it to a bigger pot. It has been in the same pot about 40 l size for many years, 2 years ago I put new potting mix and compost and trim a little bit of the roots.
Robbie
Hi Robbie, yes do transfer it into a larger pot and tease out the roots when you do it. Use fresh potting mix and do not add any Epsom salts for the first six months. Instead apply a dressing of Tui NovaTec Premium fertiliser - suitable for fruit in pots. To stimulate some fresh growth, give the plant a light prune, this will encourage fresh leaves. An application of Tui Seaweed Plant Tonic will help too. Happy gardening ^Tui Team
jenna