Will using the full contents of this around roots of a small to medium sized tree kill it? Tree thickness is side of a beercan or tuna can. thanks

It is not effective when applied to the ground. It binds to the soil and decomposes before the roots can absorb it. You have to cut the tree down, drill holes in the stump, then pour this into the holes. You may need to repeat after 24 hours. But eventually it will die. I have successfully done this on 2 trees larger than yours.

Is this effective and safe for weeds, thistle, dandelion in juniper horizontalis, i.e. h. Wiltoni?

I can says for sure that it is effective for common flower bed weeds, but I'm not sure of the types. This contains the same active ingredient as roundup - so if that product kills it, this one should too.

Wil this kill rough stalk bluegrass, without killing rest of the yard?

Like it says on the cover, it kills EVERYTHING!!! Grass, weeds, saplings......EVERYTHING!! You could probably try to spot treat, but I wouldn't recommend it. Try atrazine instead.

ASIN	B00ARKS23A
Active Ingredients	glyphosate
Best Sellers Rank	#1,882 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #40 in Weed Killers
Brand	Compare-N-Save
Brand Name	Compare-N-Save
Color	No Color
Date First Available	January 9, 2013
Global Trade Identification Number	00737716753233
Included Components	…..
Item Dimensions LxWxH	2.27 x 4.5 x 8.94 inches
Item Form	Spray
Item Package Dimensions L x W x H	9.02 x 4.33 x 2.48 inches
Item Weight	2.25 Pounds
Liquid Volume	32 Fluid Ounces
Manufacturer	Ragan & Massey Inc
Material	Plastic
Model Name	…...
Number of Items	1
Package Weight	1.28 Kilograms
Part Number	75323
Size	No Size
Style	Weed Killer
Suggested Users	Unisex-Adult
UPC	737716753233
Unit Count	32.0 Ounce
Warranty Description	Warranty

Concentrate Glyphosate Concentrate Grass & Weed Killer Herbicide, 32-Ounce

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