Each vegetable crop grows best in its own range of temperatures. The optimal temperature range for peppers and eggplants, for example, is 70Â° to 85Â°F; pollination will not occur if the night temperature falls below 55Â°F, and blossoms may fall if the temperature rises above 85Â°F.ach vegetable crop grows best in its own range of temperatures. The optimal temperature range for peppers and eggplants, for example, is 70Â° to 85Â°F; pollination will not occur if the night temperature falls below 55Â°F, and blossoms may fall if the temperature rises above 85Â°F.
Stem-walls are foundation systems constructed in three components; a spread footing to transfer load to the underlying soil, a (typically) masonry foundation wall, and a poured slab. Advantages of stem-wall foundation systems include: 1  less fill required for sloped lots (the foundation wall can built at different heights to accommodate a sloped lot) 2  a greater free-board distance from the top of slab to the surrounding grade of the lot can be accomplished giving the home a more pronounced appearance.
Slabs With foundation walls. In this type of slab, the edge of the slab is supported by the foundation wall. In the middle it will rest directly on the ground. With this type of slab, chances are there will some backfilling of dirt within the foundation walls to provide a supporting surface for the slab.