However, you can use this spacing information as one way of estimating final size and vigor. Plants that have a smaller spacing recommendation are generally going to be smaller and less vigorous.
Those with a larger spacing recommendation are generally going to be larger and more vigorous plants. Now that you've determined how many plants to use in your container it is time to start placing them in the planter. It is always best to leave some space between the top of the soil and the edge of the pot. In small containers half an inch is good, but for larger containers you should leave an inch or maybe even two.
This is called headspace and it helps to keep soil from washing out of the container and it helps channel water into the container. Without headspace water would simply run off of the container. Adequate headspace makes watering much easier. Once you've added potting soil, it is time to start arranging the plants within the planter.
It is best to leave an inch or two between the edge of the pot and the edge of the soil from the plants. This will give the plant room to root-out in all directions. From there you simply want to arrange the plants so each plant has some room and the whole planter will be filled. Generally, if you are using 3 plants in a semi-circular container, you would plant one in the middle at the front of the container and the two off-set to either side at the back of the container below, left.
For a round or square container, you will plant them in an equilateral triangle within the container below, middle and if it is an oblong or rectangular container you will likely plant them in a row below, right ,. If you are using 4 plants in a semi-circular planter, you would likely put 3 along the back with one in the middle front below, left.
For 4 plants in a round or square planter, you are most likely to either put them in a square formation or to put them in an equilateral triangle and then place one plant in the center middle photos below. For a rectangular planter, 4 plants would work best with two along the front and two along the back in a checkerboard pattern below, right. For 5 plants in a semi-circular planter, you will most likely put one plant in the front, two plants in the middle on either side of the first plant, and the last two plants at the back of the planter close to each side below, left.
For 5 plants in a circular or square planter, you are likely to put 4 of the plants in a square with the 5th plant in the middle below, center. With a rectangular planter, 5 plants would be a checkerboard with 3 plants along the front and 2 along the back of the planter photo, right. Once you get above 5 plants in a round or square container, you will probably want to plant at least 3 towards the outside, more or less equally spaced out.
Most like bright, dappled light to grow their best. Soil Conditions: Begonias grow best in light, fertile, well-drained soil. Begonias are very susceptible to root and stem rot when exposed to cold, wet soils, so proper drainage is essential. Choose a light potting soil with extra perlite if available, or create your own mix using equal parts of potting soil, perlite, and peat moss.
Spacing: Begonia tubers should be spaced about 1 foot apart in the garden, but can be planted closer together in hanging baskets and window boxes. For one begonia plant, a 6 inch pot is the smallest recommended size. See your Begonia bulb package for specific details. Planting: In zones 9 and 10, Begonias can be planted immediately outdoors.
In colder zones, Starting begonia tubers indoors to give them the head start they need see above. Begonias can be planted directly in the garden, or in hanging baskets or window boxes. Move them carefully -- their stems can break easily. Growth Habit: Tuberous begonias can be upright or trailing, depending on the variety.
Tuberous begonias can be grown in the ground under trees or in shady parts of your garden, or in containers placed in shady areas of your porch, patio, or yard. Staking: Trailing varieties of tuberous begonias are meant to creep, so they do not need staking. Upright tuberous begonias, however, can benefit from staking so the flower stems stand tall to make it easier to viewing the beautiful flowers.
When upright varieties are 4 to 6 inches tall, place a narrow bamboo or metal stake in the soil near the main stem. Fasten the stem to the stake with plant ties or garden twine, being careful not to damage the stem.
Add more ties to provide ongoing support as the plant grows. Watering: Begonias need moist soil, but are very susceptible to rotting under wet conditions. Water slightly every few days, or when the soil dries out. Water less frequently if you have regular rain. Water containers of begonias more frequently, but always be cautious to not over water, or their stems might rot. Always water around the tuber, not directly on it, to repvent water from pooling in the tuber.
Fertilizing: Amend your soil with compost before planting begonias in the ground. Begonias are heavy feeders, so fertilize plants in the ground and in containers monthly with an organic balanced fertilizer Look for fertilizer mixes.
For container begonias, use a liquid fertilizer, so the nutrients are more readily available. Mulching: Since begonias are susceptible to rot due to wet conditions, mulching should be done cautiously.
Wax begonias offer succulent stems with shiny, rounded, green or reddish-brown leaves. Begonias can live and may even bloom all year round. Begonias flourish in bright, indirect light with east-, west- or south-facing windows as ideal locations. When grown in a south-facing window, burning could occur; if this happens, move the begonia plant further away from the window.
Avoid giving them too much water and allow them to dry out slightly between waterings. If they are kept cool, you may notice they can tolerate a longer time without water. Place the begonia pot in a bright spot where it can receive morning sunlight and a bit of afternoon shade. Tuberous begonias prefer less heat and more shade, and they work well in the late summer. If the begonia plant begins to branch out, it may need more light; conversely, if you begin to notice growth or burning, you might need to reduce the amount of light.
Indoor begonias can be pruned at any time. Plant the tubers in trays or pots with the hollow side up. Begonias prefer partial shade but do ensure they have plenty of light and air. The soil should be kept moist and regular watering in the evening is recommended.
Remove flowers once they have wilted will encourage new flowers to growing and thus increase flowering time.
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