MARK-IT BLUE is a concentrated blue landscape dye that provides temporary highly-visible evidence of spray application patterns. MARK-IT BLUE readily dissipates, is non-toxic, and compatible with water-soluble solutions. IT DOES NOT CONTAIN HERBICIDE. 

It is ideal for commercial or residential use. Use it for golf courses, parks, cemeteries, athletic fields, or any turf or grass areas...virtually anywhere where spray evidence is needed.

• Spray Additive with Non-Staining Dye
• 8 ounces
• When applying insecticide, herbicide, or fungicide, use Mark-It Blue spray solution colorant to indicate where you have sprayed
• Helps to avoid overlapping sprays as well as ensure that you have applied the chemical to all desired areas
• The blue color breaks down with exposure to heat and sunlight. The more sunlight and heat, the faster the breakdown.
• Will not permanently stain vegetation, soil or skin, but if spilled on fabric wash off before it has a chance to dry
  
• Can be used with all types of equipment
• Not recommended with oil-based herbicide solution
• Mark it Blue is NOT an herbicide and does not contain herbicide

These are general guidelines for use with the Buckthorn Blaster bottle. You may need more or less for your specific project:

Add about ¼ teaspoon (roughly 20 drops) of MARK-IT BLUE per 4 oz bottle. Fill the bottle halfway with herbicide, add the dye, then top off. Use a little more if you need stronger color on dark bark.