Dear Sir - I am confident that there are many of your lady readers, and perhaps many of the other sex, who are puzzed among the many new manures, and having failed with some, and injured their plants with others, they end by raising only sickly and meagre plants, when they might have them presenting a luxuriant and satisfactory appearance - with leaves of the darkest green, and flowers or fruit of double the usual size.

Having made a trial for three years past, with a perfectly safe and satisfactory liquid fertilizer, which appears to suit all kinds of vegetation, which is clean and easily applied, and procured without difficulty, in any town, I confidently recommend it to your readers, especially those who wish to give especial pains to, and get uncommon results from, certain favorite plants - either, in pots, or in the open garden - plants whose roots are within such a moderate compass, that they can be reached two or three times a week, if not often-er by the watering-pot.

This liquid fertilizer is made by dissolving half an ounce of sulphate of ammonia in a gallon of water.

Nothing so good can be cheaper, and the substance may be obtained at almost any apothecary's.

Now for the mode of using it. I may say, at the outset, that weak as this solution appears to be, and is, if plants are watered with it daily, they will die - just as certainly as a man will who drinks nothing but pure brandy.

The right way to apply it is to water the plant with this solution every sixth time; the other five times with plain water.

The proportion is so simple, and the mode of using it so easy to understand, that the most ignorant person cannot possibly blunder about it - if he can count six. If we prepare the solution occasionally, and water our plants in pots every Saturday, with this ammonia water, and all the rest of the time with plain water, we shall hare a safe rule.

The result will, I am sure, both delight and surprise every person who will make a trial of it. It has become such an indispensable thing with me, that I regularly mix a barrel of it every Friday, and use it on Saturday, upon any plants that I particularly wish to invigorate and stimulate. I do not know that I have seen a single instance of its disagreeing with any plant - ammonia being the universal food of vegetation. Of course, the more rapid growing plants - those with foliage that perspire a great deal, are most strikingly benefitted by it. Of course, also, plants that are at rest, or not in a growing state, should not be fed with it; but any plant that is about starting, or is actually in a growing state, will not fail to be wonderfully improved by it. Many plants that have fallen into a sickly-state by reason of poor, or worn out soil, will, usually, in the course of a month, take quite another aspect, and begin to develope rich, dark green foliage. I will enumerate some of the things that I have had great success with.