True but the time the Falling waters baldy gets to the size that knees would become visibility, you will not want to have grass growing up to the trunk anyway. You will want a nice mulch ring there to showcase the tree.

Here's some weepers that I googled for you. It'll get you started LOL! I don't know if these are hardy for your zone but it gives a nice list of weepers to look up and study. Good luck. MeMo Weeping Cherry (Prunus subhirtella 'Pendula') Weeping Cedar (Cedrus 'Aurea') Weeping Salix (Salix Hakuro Nishiki) Weeping Spirea shrub (Spiraea japonica Shibori) Weeping Beech Weeping Cherry Weeping Hemlock Weeping Larch Weeping Norway Spruce Weeping White Pine BETULA PENDULA TRISTIS A graceful form of the silver birch with steeply drooping branches; youngii is smaller, more compact and slow-growing. BUXUS SEMPERVIRENS PENDULA A good weeping form of the common box. CARAGANA ARBORESCEN PENDULA An attractive small weeping tree with yellow pea-shaped flowers and fernlike leaves. CRATAEGUS MONOGYNA PENDULA A weeping hawthorn; pendula rosea has pink flowers. FAGUS SYLVATICA PENDULA The weeping beech, making a big tree; purpureopendula is a weeping form of the purple beech. FRAXINUS EXCELSIOR PENDULA The well-known weeping ash. GLEDITSCHIA TRIACANTHOS BUJOTI A honey-locust with pendulous branches, ILEX AQUIFOLIUM ARGENTEOMARGINATA PENDULA Perry's silver weeping holly, berrying freely. LABURNUM ANAGYROIDES PENDULUM A gracefully weeping laburnum. MALUS The following crab-apples have pendulous branches: M. floribunda' `Excellens Thiel', a small tree with crimson buds and pink flowers, floriferous but no fruit; M. prunifolia pendula, the weeping Siberian crab, with numerous small, scarlet, persistent fruit; M. pumila pendula `Elise Ratlike', a weeping form of the native crab. MORUS ALBA PENDULA The weeping white mulberry is a small tree with perpendicular branches, the fruit is insignificant. PRUNUS PERSICA'Windle Weeping' A weeping peach with double pink flowers; P. subhirtella pendula, the weeping spring cherry, has very numerous pale pink flowers; in pendula rubra they are deeper colored. P. yedoensis perpendens is a very pendulous form of the early Yoshino cherry. PYRUS SALICIFOLIA PENDULA A very pendulous form of the silver willowleaved pear, SALIX ALBA TRISTIS The now common weeping willow, making a large tree; S. babylonica is rare and not satisfactory. SOPHORA JAPONICA PENDULA A small arbour-like tree with slender branchlets falling perpendicularly. SORBUS-ARIA A weeping form of the whitebeam. S. aucuparia pendula, a weeping form of the rowan. Both are small trees. TILIA PETIOLARIS The weeping silver lime is a magnificent tree with a silvery sheen on the underside of the large leaves. ULMUS GLABRA CAMPERDOWNII The smaller of the two weeping wych elms with very pendulous branches, pendula being larger and more spreading in form. Conifers CHAMAECYPARIS LAWSONIANA INTERTEXTA A tall cypress of great beauty with drooping branches. C. nootkatensis pendula a handsome, rather large tree with long drooping branches. JUNIPERUS RECURVA COXII A moderate-sized, narrow tree with long, glaucous shoots drooping steeply. LARIX LEPTOLEPIS PENDULA A weeping form of the Japanese larch. PICEA BRACHYTYLA This has slender, pendulous branchlets, the leaves blue and white underneath; P. breweriana, Brewer's weeping spruce, is a sombre tree with very long branchlets that hang vertically; P. smithiana, the Himalayan spruce, is a large tree with steeply drooping branchlets and exceptionally long leaves. TAXUS BACCATA DOVASTONIANA A yew with spreading branches from which the branchlets droop; aureovariegata is a golden-leaved form. BETULA PENDULA TRISTIS A graceful form of the silver birch with steeply drooping branches; youngii is smaller, more compact and slow-growing. BUXUS SEMPERVIRENS PENDULA A good weeping form of the common box. CARAGANA ARBORESCEN PENDULA An attractive small weeping tree with yellow pea-shaped flowers and fernlike leaves. CRATAEGUS MONOGYNA PENDULA A weeping hawthorn; pendula rosea has pink flowers. FAGUS SYLVATICA PENDULA The weeping beech, making a big tree; purpureopendula is a weeping form of the purple beech. FRAXINUS EXCELSIOR PENDULA The well-known weeping ash. GLEDITSCHIA TRIACANTHOS BUJOTI A honey-locust with pendulous branches, ILEX AQUIFOLIUM ARGENTEOMARGINATA PENDULA Perry's silver weeping holly, berrying freely. LABURNUM ANAGYROIDES PENDULUM A gracefully weeping laburnum. MALUS The following crab-apples have pendulous branches: M. floribunda' `Excellens Thiel', a small tree with crimson buds and pink flowers, floriferous but no fruit; M. prunifolia pendula, the weeping Siberian crab, with numerous small, scarlet, persistent fruit; M. pumila pendula `Elise Ratlike', a weeping form of the native crab. MORUS ALBA PENDULA The weeping white mulberry is a small tree with perpendicular branches, the fruit is insignificant. PRUNUS PERSICA'Windle Weeping' A weeping peach with double pink flowers; P. subhirtella pendula, the weeping spring cherry, has very numerous pale pink flowers; in pendula rubra they are deeper colored. P. yedoensis perpendens is a very pendulous form of the early Yoshino cherry. PYRUS SALICIFOLIA PENDULA A very pendulous form of the silver willowleaved pear, SALIX ALBA TRISTIS The now common weeping willow, making a large tree; S. babylonica is rare and not satisfactory. SOPHORA JAPONICA PENDULA A small arbour-like tree with slender branchlets falling perpendicularly. SORBUS-ARIA A weeping form of the whitebeam. S. aucuparia pendula, a weeping form of the rowan. Both are small trees. TILIA PETIOLARIS The weeping silver lime is a magnificent tree with a silvery sheen on the underside of the large leaves. ULMUS GLABRA CAMPERDOWNII The smaller of the two weeping wych elms with very pendulous branches, pendula being larger and more spreading in form. Conifers CHAMAECYPARIS LAWSONIANA INTERTEXTA A tall cypress of great beauty with drooping branches. C. nootkatensis pendula a handsome, rather large tree with long drooping branches. JUNIPERUS RECURVA COXII A moderate-sized, narrow tree with long, glaucous shoots drooping steeply. LARIX LEPTOLEPIS PENDULA A weeping form of the Japanese larch. PICEA BRACHYTYLA This has slender, pendulous branchlets, the leaves blue and white underneath; P. breweriana, Brewer's weeping spruce, is a sombre tree with very long branchlets that hang vertically; P. smithiana, the Himalayan spruce, is a large tree with steeply drooping branchlets and exceptionally long leaves. TAXUS BACCATA DOVASTONIANA A yew with spreading branches from which the branchlets droop; aureovariegata is a golden-leaved form.

can you take a closer photo? from afar it kind of resembles a japanese maple but that doesn't seem right. Also where are you located so we can eliminate higher zone plants.

add you big city location to every post.. for best info .. a pic would help when you are looking for ideas specific to a given spot ... i think of flowering trees as very limited as to when they flower ... so i dont know if i would limit my choices to when the tree is in flower ... what about the rest of the season ... somewhere between the flowering and fall color ... not sure you have space for a lilac ... nor a monster wisteria ... and im not sure you could have a concurrent flowering clem .. but again.. i dont know where you are ... ken