Answer: Some of what she is looking for can be achieved by pruning and training the tree. But here are a few suggestions:
Malus 'Louisa' -- extreme weeping habit, pink flowers, yellow fruit
M. 'Molten Lava' -- weeping habit, red buds/white flowers, red fruit
M. 'Red Jade' -- graceful weeper with pink buds/white flowers
M. sargentii -- dwarf, spreading branches, mature height of 6 to 8'
M. 'White Cascade' -- graceful weeper, white flowers
All these are available from Carroll Gardens, 800-638-6334
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