Some plunge in a cold frame until growth begins, but a preferable plan is to plunge in a bottom heat of from sixty to seventy degrees if early bloom is required.
Begonias are also propagated by division of the tubers, like potatoes; by cuttings stuck in pots in a bottom heat of about seventy degrees; and by leaf-cuttings on cocoa-fibre or sand.
When the buds show, the pots may be put in bottom heat in a temperature of sixty-five to seventy degrees.
A bottom heat will be necessary when they are repotted, which may be done in about three weeks or a month.
Shake out the roots, and repot in good fibrous loam, with a sprinkling of sand, and place them in bottom heat.
Like the seed box, however, it will be greatly helped by ten or fifteen degrees of bottom heat in addition.
It should be fresh and plump, and rooting will be made more certain by bottom heat.
If this can be given as what the florists term "bottom heat," that is, applied under the seed box, so much the better.
Mr. Gunter tried to substitute the heat of steam for that of tan, as a bottom heat, but did not succeed.
In all cuttings, bottom or root growth should precede top growth, and this is aided by bottom heat.
Bottom heat is helpful to germination in most seeds, but, except in the case of certain tropical species, it should not be strong.
The principle of their construction is essentially the same as of those described in previous pages--bottom heat, a tray of water, and a bed of soil.
Bottom heat is always essential to the best success with cuttings.
When the buds are visible, plunge the pots in a bottom heat of 65° or 70°, and in a week the flowers will be fit for use.
When first potted, give them very little water, and promote growth by means of a bottom heat of 65°.
The half-hardy varieties should be sown from January to March in pans placed on bottom heat.
The mean temperature of the soil, at a slight distance below the surface, is universally above that of the superincumbent air; and consequently some degree of bottom heat is always supplied to plants, in a state of nature.
The importance of bottom heat in the culture of tender plants, has always been well known by its practical effects.
The principle objections to tank heating, as usually employed, are an excess of bottom heat and a deficiency of atmospheric heat, with a superabundance of moisture when the vapor from the tank is not properly excluded from the house.
If the bottom heat is of the required temperature, any attempt to counteract the coldness of the air of the house by increasing the fire, would produce an injurious excess of bottom heat.
Thus the whole radiating surface of the top of the tank may be directed into the house, or may be confined as bottom heat, as may be found necessary.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "bottom heat" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
