It is possible to use fertilizer to speed up the growing process.

I wonder how big they might have been if he had used fertilizer?

Some people want to use only fertilizers from organic sources.

The goal of this research is to increase the plants' productivity without using fertilizers.

The report included plans to use organic fertilizers, estimates of the water to be used and the time to complete the course.

They also reinforce the need to be aware of using too much fertilizer and suggest one to three applications a year.

In a week or so, use water-soluble fertilizer to spur growth.

The fish farms often use fresh fertilizer from pigs and poultry.

Some have suggested using liquid fertilizer to stop this.

Although your plants will probably provide you with herbs without using fertilizer, you won't be getting their best effort.