Ask a Question
Notify Me On Question Update
Email this Question
Hi, I have a lot of two year hybrid poplars that we've planted for a wind break and the leaves near the trunks are beginning to turn yellow. I've read that this can be because of lack of water or too much water or not enough fertilizer. It's July and we water them every day because of the 90+ temps. Any suggestions?
Rate This FAQ
It sounds like too much water. I prefer deeper and less frequent watering, normally established trees need a good soak every week to 10 days. Also, frequent watering does not force the tree to grow deep roots that go after water and will sustain a tree through hot days.
Frequent watering also washes away the nitrogen so a tree will rob nitrogen from older leaves to keep growing. This best explains your described your situation. If it were not enough water you would see browning of outer leaves especially those on the south and west side that get the brunt of wind, sun, and warm temperatures. Slowly cut back on your watering intervals but increase the amount. let the hose run longer but put more days between watering. We don't normally encourage fertilization of trees, especially not in the heat of the summer where it encourages lush green growth. Spring and late fall would be better.
Submit Your Suggestion
Other Questions In This Topic
- I have a mature elm in my backyard that was probably planted when the house was built in the 70's. We bought it 3 years ago and I have noticed that something is eating away at the bark. There is a reddish-brown streak (almost like what you would see in a human that has blood poisoning) that runs up the bark. I cut off one of the lower limbs that the problem had progressed to. The bark is very "mushy" and looks decayed. Chunks of bark fall off at the affected areas. I cannot see any bugs that may be causing this but I suspect that is the cause. This tree has 2 main branches that extend from the bottom and this is where the main damage seems to be. I am concerned that the tree could "split" at this point if it becomes weakened. I need to know the cause and treatment.
- What materials should I use to raise depressions in my lawn around retaining walls and sidewalks?
- We created square foot gardens last year and have discovered the cat has used them for a litter box over the winter and spring. There isn't a large amount of feces,which we remove, but we are concerned that it may have contaminated the soil. Should we dig it out and start over?
- I have an 11 year old sugar maple. For the past few years the leaves have been getting more and more yellow. I bought an iron product, read the directions, and sprinkled it around the base. Instead of turning green the leaves are still yellow and small brown spots all over them. Help!
- I have some problems with native Juniper trees dying(25 ft average height). They start turning yellow (chlorosis has been ruled out) then brown on south side first, then slowly spread to north end of plant. I have cut down one and found no signs of insect damage or disease. Only trees located next to a dirt road(South of trees) are currently affected. They started changing in color last summer. The county does spray for russian thistle on road. Yet no other trees seem to be affected. Can you provide other possible reasons or someone that may be able to come and see them (test them)?
- How many gallons per hour are needed for mature fruit trees? Also how many times a week and how long each time should trees be watered?
- I have several large beds in which I would like to plant shrubs, perennials, and some annuals. I am wondering what, if any, weed barrier I should use for these beds. I have heard different opinions advocating weed fabric, newspaper, or no weed barrier at all other than a layer of bark/mulch. If a thick layer of mulch alone is virtually as effective as weed barrier, I would rather avoid the expense and hassle of laying the barrier. Which is the best option?
- I have seen ads for canada green grass seed. It talks about it's resistance to drought, and the fact that is a very hearty grass. Do you have any info on this grass seed?