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Asked by
dorkay on
March 24, 2015

Q. spider mites on blue spruce

Since Bayer have monopolized the market, they have stopped producing concentrated multi-rose concentrate 1 in 3 and sell it by diluted 1 litre bottles. We normally use 4 litres on our blue spruce. Is there any way around this blatant exploitation for poor pensioners like myself?

Answered by
Downtoearthdigs on
March 24, 2015
Certified Expert
A.

Perhaps you could directly contact the manufacturer to inquire about purchasing different quantities of their product.

Here is a link that may offer you some alternatives to rid the spider mites.

Good Luck!

https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-control.htm

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Asked by
weinhammerc on
April 18, 2015

Q. Blue Spruce

Our blue spruce has about three tips. Why is this and is there anything we need to do to make it a single tip? The tree is healthy otherwise, but we need to find out if we need to cut or clip one or two of the tips. We don’t want it turning into a short shrub.

Thank you in advance.

Answered by
Downtoearthdigs on
April 20, 2015
Certified Expert
Asked by
debi on
April 21, 2015

Q. Blue Spruce losing bottom branches

I have a very tall Blue Spruce that is losing it’s bottom branches. What can I do? The tree is very tall…I’m guessing 30 ft and it looks beautiful from about 4 ft up, but the bottom branches are bare and it’s getting worse and going farther up.

Answered by
shelley on
April 21, 2015
Certified Expert
A.

If the upper branches provide too much shade, the lower branches naturally die off.

On a more serious note: It could be Cytospora Canker, Rhizosphaera Needle Cast, or Stigminia Needle Cast, which are all discussed in detail on the following website:

https://www.extension.iastate.edu/harrison/news/common-diseases-blue-spruce
https://www.ipm.iastate.edu/ipm/hortnews/2008/2-6/Stigmina.html

It could also be the handiwork of a spruce spider mite:
https://extension.psu.edu/ipm/program/christmas-tree/pest-fact-sheets/needle-discoloration-and-injury/spruce-spider-mite.pdf

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Asked by
Anonymous on
June 17, 2015

Q. My shrubs and plants are dying

I recently moved into my house which faces the south. So far I have had to pull out 5 medium sized shrubs because they died. My blue spruce is turning brown as is another evergreen. In another area in the front of the house, the hydrangeas are dying. If I walk around the property, I see at least 4 more dead or dying bushes. Some hostas on the side of the house are dying. I live on Long Island and we had a wet spring. I have been watering regularly. We did find a bird house behind a bush that had some bugs on it (grub-like). My lawn is also getting brown spots. Any ideas?

Answered by
Downtoearthdigs on
June 18, 2015
Certified Expert
A.

It may be that the plants are getting too much water. outdoor plants only need about 2-4" of water a week, including rainfall, during the spring and summer. If they are getting more than that and the ground is not draining, the roots could be rotting. You need to make sure that the plants are only getting the amount of water they need and that they are not in standing water.

Another possibility is that there are grubs. The ground may have grubs that are attacking the grass and the root of the shrubs. This article will help you with that:
https://www.gardeningknowhow.com/plant-problems/pests/lawn-grubs-how-to-get-rid-of-grub-worms.htm

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Asked by
Anonymous on
July 21, 2015

Q. blue spruce

Will blue spruce live in northern Louisiana?

Answered by
Downtoearthdigs on
July 22, 2015
Certified Expert
A.

I would not recommend it. Zone 7 is as far south as it will grow and then it's stressed from the summer heat. However, you may want to check out the Arizona cypress. This would be a better choice and great substitute.

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Asked by
Anonymous on
September 11, 2015

Q. Trees in pots

I have two small blue spruce trees (18″ high) planted in large pots, which have been outside framing the front door(faces southwest) since spring. Will I need to winter these inside or in an unheated garage or what would be the best choice? Some winters we can get as cold as -20.

Answered by
Downtoearthdigs on
September 13, 2015
Certified Expert
A.

You will not need to winter the trees inside.
The are winter hardy to zone 3.
Continue to water the trees into the dormancy and add a small amount of water a few times throughout the winter.

https://www.gardeningknowhow.com/ornamental/trees/colorado-blue-spruce/care-for-colorado-spruce.htm

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