in Gardening, a walk planted on each side with trees, and leading to a house, garden-gate, wood, &c. and generally terminated by some distant object.
All avenues that lead to a house ought to be at least as wide as the whole front of the house, if wider they are better still; and avenues to woods, and prospects, ought not to be less than 60 feet wide. The trees should not be planted nearer to one another than 35 feet, especially if they are trees of a spreading kind; and the same ought to be the distance, if they are for a regular grove.
The trees most proper for avenues with us, are the English elm, the lime, the horse-chefnut, the common chefnut, the beech, and the abele. The English elm will do in all grounds, except such as are very wet and shallow; and this is preferred to all other trees, because it will bear cutting, heading, or lopping in any manner, better than most others. The rough or smooth Dutch elm is approved by some, because of its quick growth. This is a tree which will bear removing very well; it is also green almost as soon as any plant whatever in spring, and continues so as long as any, and it makes an incomparable hedge, and is preferable to all other trees for lofty espaliers. The lime is valued for its natural growth and fine shade. The horse-chefnut is proper for all places that are not too much exposed to rough winds. The common chefnut will do very well in a good soil; and rises to a considerable height, when planted somewhat close; though, when it stands single, it is rather inclined to spread than to grow tall. Avenue, The beech is a beautiful tree, and naturally grows well with us in its wild state; but it is less to be chosen for avenues than the before-mentioned, because it does not bear transplanting well, but is very subject to miscarry. Lastly, the aspen is fit for any soil, and is the quickest grower of any forest-tree. It seldom fails in transplanting; and succeeds very well in wet soils, in which the others are apt to fail. The oak is but little used for avenues, because of its slow growth.
The old method of planting avenues was with regular rows of trees, and this has been always kept to till of late: but we have now a much more magnificent way of planting avenues; this is by setting the trees in clumps, or platoons, making the opening much wider than before, and placing the clumps of trees at about 300 feet distant from one another. In each of these clumps there should be planted either seven or nine trees; but it is to be observed, that this is only to be practised where the avenue is to be of some considerable length, for in short walks this will not appear so sightly as single rows of trees. The avenues made by clumps are fittest of all for parks. The trees in each clump should be planted about 30 feet asunder; and a trench should be thrown up round the whole clump, to prevent the deer from coming to the trees to bark them.