heat artificially applied to a container in which plants are grown in order to induce their germination, rooting, or growth.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use bottom heat in a sentence
After this dressing, the plants needed not to be moved again till they ripened their fruit, unless they required more bottom heat.The different modes of cultivating the pine-apple | John Claudius Loudon
Mr. Gunter tried to substitute the heat of steam for that of tan, as a bottom heat, but did not succeed.The different modes of cultivating the pine-apple | John Claudius Loudon
A bottom heat will be necessary when they are repotted, which may be done in about three weeks or a month.
Start old and young plants of Clerodendrons, Dipladenias, and Stephanotis, in a sweet bottom heat.
To be then favoured with a bottom heat of from 75 to 80, and slightly shaded during bright sunshine.