Have 4 Southern Magnolia saplings - about 5" tall; grown from last year's pod seed. Will trade for Gardenia, any jasmine family tree/shrub, fragrant vines of any kind, rambler roses or ..

My first question is do you put weed killer on your lawn? If you do, it can stunt the growth of your trees. The roots of your trees reach out to the dripline (where the tips of the branches end), and they take in anything you put on the grass. If you regularly use weed killer of any kind around a magnolia, it will not grow. Pre-emergent is the worst. If that is the case, there is nothing you can do but stop using the weed killer and letting the tree grow out of it. Pre-emergent weed killers have growth retardants in them, and while they won't harm established trees, they can keep sensitive trees like magnolias from thriving. I'm sure someone will come along and tell me that is chemically untrue, but practicing horticulture in the south for over 40 years, I learned a few things about magnolias. You can't believe everything chemists say about their products. Now, to try to fix it. It can't grow if it can't get nutrients. Sprinkle a cup of Epsom salts around the tree from the trunk out to the dripline. Epsom salts helps plants make feeder roots. It may be that your tree's roots have hit hardpan and can't get any further down. This is very common in FL, where lots are built up with fill dirt, which is mostly marl, with only a few inches of topsoil on top. The Epsom salts will help it make little roots that can gather nutrients. Wait until after it is done blooming, then go out to the dripline, then add 6 inches (so 6 inches out from where the branches end) and dig a trench outward 12 inches wide and 8 inches deep. Fill the trench with compost, leaves, any kind of organic matter you can get. If you can afford Black Kow, that is perfect. DO NOT add fertilizer. This gives the roots some really good space to grow into. After it blooms this year, start feeding it high-nitrogen fertilizer monthly until October, like a lawn fertilizer, just a handful or two. Spread it from 6 inches out from the trunk to the dripline, and water in well. This will spur it to put out vegetative growth. If this doesn't work, you can try root pruning it in the fall, but this usually works. I learned this from a very wise man who worked with plants for over 40 years. I've seen this technique work wonders.

Image by: Clare_CAMichelia Figo var. SkinnerianaWhich Shrubs Smell Good? -     Fragrant Plants       The following list of fragrant plants was compiled by Clare_CA.  Please note, this list is considered a work in progress with additional fragrant plants added over time.       Plant Name Abelia mosanensis ‘bridal bouquet,’ fragrant abelia Abelia trilora Acidanthera, 'Peacock orchid' Agastache ‘Summer Breeze’ Agastache foeniculum Anise Hyssop Aglaia odorata Aloysia virgatas, Sweet Almond Azara microphylla Beaumontia grandiflora Blanc Double de Coubert rugosas Boronia Boronia megastigma Brassavola nodosa (Lady of the Night orchid) Brugmansia Brunfelsia americana Brunfelsia australis Brunfelsia Nitida (Lady of the Night) Brunfelsia pauciflora Buddleia Asiatica Calycanthus occidentalis, Spice Bush Cananga odorata Carolina allspice, Calycanthus sp. Centaurea moschata Sweet Sultan (Annual) Cestrum diurnum Cestrum nocturum Chimonanthus praecox Chlidanthus fragrans Perfumed Fairy Lily (Bulb) Choisya ‘Aztec Pearl,’ Aztec Pearl Mexican Orange Choysia ternata, Mexican Mock Orange Cimicifuga 'Hillside Black Beauty' Citrus (esp. ‘Bouquet de Fleurs’) Citrus (tree) Clematis Montana Clematis, Sweet Autumn Clematis Clerodendron phillipinum Clerodendrum trichotomum Clethra alnifolia Clethra 'Ruby Spice' Coleonema pulchrum/Breath of Heaven Crinum odorata Crinum powellii and C. moorei Daphne bholua Daphne 'Carol Mackie' Daphne odora Datura Inoxia Datura Metel Datura Stramonium var Tatula Datura wrightii Dianthus ‘Bath’s Pink’  Diplarrhena moraea ‘Slieve Donard,’ White Flag Iris Dipogon lignosus Diurnum Double Delight - Hybrid Tea Rose Dracaena fragans Eriodictyon capitatum Lompoc Yerba Santa Erysimum cheiri, Wallflower  (Annual) Eupatorium ligustrinum Euphorbia leucocephala Freesia (Bulb) Gardenia angusta Gardenia 'White Gem' Gladiolus callianthus Abyssinian Sword Lily (Bulb) Gladiolus tristis Marsh Afrikaner (Bulb) Hansa - Rugosa Rose Hedychium coronaria, common white ginger Hedychium coronarium Hedychium flavescens/gardnerianum/flavum/coronarium Hedychium gardnerianum is an outstanding ginger lily. Hedysarum coronarium French Honeysuckle Helichrysum (Licorice plant) Hemerocallis ‘Fragrant Treasure,’ Frangrant Treasure Daylily Hemerocallis ‘Hyperion,’ Hyperion Daylily Hemerocallis ‘Sherwood Gladiator,’ Sweet Gladiator Daylily Hemerocallis citrina, Lemon Daylily Hemerocallis lilioasphodelus, Lemon Lily Hemerocallis minor, Dwarf Daylily Holarrhena densiflora (Jasmine Tree) Hoya lacunosa Hyacinths, Nicotiana, oriental lilies, and easter lilies Hymenocallis ‘Erotica’ Fragrant Basket Lily (Bulb) Hymenocallis ‘Sulphur Queen’ Sulphur Queen B. Lily (Bulb) Hymenocallis ‘Tropical Giant’ Hybrid Basket Lily (Bulb) Hymenocallis narcissiflora (+ ‘Advance’) Peruvian Daffodil (Bulb) Hymenocallis x festalis ‘Zwanenburg’ Primrose Spider Lily (Bulb) Hymenocallis x festalis Spider Lily (Bulb) Hymenosporum flavum, Australian Frangipani, Sweetshade (tree) Illicium Floridanum Jasmine molle Jasminum Azoricum Jasminum humile, Italian/Yellow Jasmine Jasminum officinale, Poet’s Jasmine Jasminum polyanthum, Pink/Winter Jasmine Jasminum Sambac Flore Plena Jasminum Sambac, Belle of India Jasminum Sambac, Grand Duke Jasminum Sambac, Maid of Orleans Jasminum x stephanense, Stephan Jasmine Lathyrus odoratus, Sweet Pea (Annual) Laurus nobilis, Grecian Bay Laurel (tree) Lavandula, Lavenders (many) Lepechinia hastata, Baja Pitcher Sage Leptospermum petersonii,  Lemon-scented Tea Tree (tree) Lillium "Le Reve" Lobularia maritima, Sweet Alyssum (Self-sowing Annual) Lonicera Lonicera japonica Luculia intermedia/pinceana-Luculia Luculia pinceana/intermedia/gratissimus Madame Isaac Pereire, Antique Rose Magnolia ‘Timeless Beauty’ (tree) Magnolia grandiflora, Southern Magnolia (tree) Magnolia hypoleuca Magnolia salicifolia ‘Kockanakee’ (tree) Magnolia salicifolia ‘W.B. Clarke’ (tree) Magnolia seiboldii, Oyama Magnolia Magnolia stellata, Star Magnolia Magnolia Virginiana Magnolia x loebneri ‘Ballerina’ (tree) Magnolia x loebneri ‘Spring Snow’ (tree) Magnolia x stellata ‘Royal Star’ (tree) Magnolia x stellata ‘Waterlily’ (tree) Magnolia x wieseneri Mandevilla laxa Matthiola incana, Stock (Annual) Matthiola longipetala bicornis, Evening-scented Stock (Annual) Melanoselinum decipiens Michelia champaca Michelia chapensis Michelia doltsopa  Michelia figo, Banana Shrub Michelia Wilsonii (sinensis) Michelia x alba Michelia x foggii ‘Jack Fogg’ (tree) Milletia reticulata Mirabilis, Four o'clocks Mitriostigma Axillare or African Gardenia Montanoa grandiflora, Narcissus jonquilla ‘Kinglet’, ‘Sweetness’, ‘Vireo’Jonquil (Bulb) Narcissus papyraceus, Paper Whites (Bulb) Narcissus tazetta, Narcissus (Bulb) Narcissus x odorus, Campernelle Jonquil (Bulb) Nicotiana alata Nicotiana sylvestris Orchid Vanda merillii Osmanthus fragrans, Sweet Olive Passiflora Alata “Ruby Glow” Passiflora belotti Passiflora colinvauxii (honeysuckle fragrance) Passiflora helleri Passiflora Incense Passiflora serratodigitata Passiflora sprucei Pelargonium , Scented Geraniums (all*) -- Pelargonium ‘Filicifolium’  Balsam Pelargonium ‘Tutti-Fruiti’ Tutti-Fruiti Pelargonium capitatum ‘Attar of Roses’ Old Rose Pelargonium crispum ‘Peach Cream’ Peach Pelargonium crispum ‘Prince of Orange’ Orange Pelargonium crispum Lemon Pelargonium graveolens ‘Rober’s Lemon Rose’ Lemon-rose Pelargonium graveolens Rose Pelargonium grossularioides Coconut Pelargonium nervosum ‘Torento’ Ginger Pelargonium nervosum Lime Pelargonium odoratissimum, Apple Pelargonium quercifolium, Pelargonium Almond Pelargonium scabrum ‘M. Ninon’ Apricot Pelargonium scarboravia Strawberry Pelargonium tomentosum ‘Chocolate Joy’ Chocolate-mint Pelargonium tomentosum Peppermint Pelargonium x fragrans ‘Nutmeg’ Nutmeg Pelargonium x fragrans ‘Old Spice’ Old Spice Philadelphus ‘Fallbrook’, ‘Galahad’ Mock Orange Philadelphus microphyllus Small-leaved Mock Orange Philadelphus x virginalis ‘Glacier’ Dwarf Mock Orange Pittosporum tobira Japanese Mock Orange Pittosporum tobira Mock Orange Pittosporum undulatum, Victorian Box Plumeria (tree) Polianthes tuberosa, Tuberose (Bulb) Portulandia grandiflora Primula florindae, the Tibetan Primrose Prospero & Golden Celebration - David Austin Roses Psoralea pinnata Quisqualia indica, Rangoon Creeper Reseda odorata Mignonette  (Annual) Rhododendron atlanticum fragrance of gardenia and clove Ribes aureum, Golden Currant  Rosas Typhoo Tea Rose, (The Apothecary Rose; deep pink) Rose, Angel Face (floribunda; mauve) Rose, Apricot Nectar (floribunda; apricot blend) Rose, Arizona (grandiflora; orange blend) Rose, Betty Prior (floribunda; medium pink) Rose, Buff Beauty (Hybrid Musk; apricot blend) Rose, Cathedral (floribunda; apricot blend) Rose, Chinatown (floribunda; deep yellow) Rose, Chrysler Imperial (HT; also cl.; crimson) Rose, Command Performance (HT; orange-red) Rose, Comte de Chambord (Portland; pink blend) Rose, Crimson Glory (HT; also cl.; crimson) Rose, Dainty Bess (HT; light pink; single) Rose, Double Delight (HT; red-white bicolor) Rose, Electron (HT; deep pink) Rose, Etoile de Holland (HT; also cl.; crimson) Rose, Evelyn (English; apricot-pink blend) Rose, Fashion (floribunda; orange-pink blend) Rose, Fragrant Cloud (HT; coral red-orange blend) Rose, Fragrant Hour (HT; orange-pink blend) Rose, François Dubreuil (Tea; dark red) Rose, Friendship (HT; deep pink) Rose, Granada/Donatella (HT; red-yellow blend) Rose, High Hopes (climber; med. pink) Rose, Intrigue (floribunda; mauve blend) Rose, Ispahan (Damask; medium pink) Rose, Jacques Cartier (Portland; light pink) Rose, Jadis (HT; pink) Rose, Just Joey (HT, orange blend) Rose, Lemon Spice (HT; pale yellow) Rose, Love (Gr.; red blend) Rose, Marechal Niel (cl. Noisette; softest yellow) Rose, Mirandy (HT; garnet red) Rose, Mister Lincoln (HT; dark red) Rose, Nuage Parfumé (HT; also cl.; coral-orange-red blend) Rose, Oklahoma (HT; deep red) Rose, Papa Meilland (HT; deep crimson) Rose, Perfume Delight (HT; medium pink) Rose, Rosa gallica officinalis/duplex Rose, Rosa gallica versicolor (Gallica; striped pink) Rose, Rosa x damascena bifera (Damask, Rose of Castile; m. pink) Rose, Royal Amethyst (HT; lavender) Rose, Saratoga (floribunda; white) Rose, Sheer Bliss (HT; white/pink blend) Rose, Simplicity (floribunda; light pink) Rose, Spanish Sun (floribunda; deep yellow) Rose, Spartan (floribunda; orange-red blend) Rose, Sunsprite (floribunda; deep yellow) Rose, Sutter’s Gold (HT; orange blend) Rose, Sweet Surrender (HT; silvery med. pink) Rose, Tiffany (HT; pink blend) Rose, White Lightnin’ (GR; white) Rose, Wild Spice (shrub) Rosmarinus officinalis Salvia clevelandii Salvia clevelandii 'Aromas' Salvia clevelandii/Cleveland Sage Salvia elegans, Pineapple Sage Salvia melissodora Grape-scented Sage Sarcococca Hookeriana Humilis Sarcococca rustifolia Scentimental, Hybrid Tea Solandra maxima Sombreuil climbing antique Stephanotis floribunda Sweet Afton Sweet Chariot - miniature "hanging basket" rose Syringa microphylla 'Superba' Tagetes nelsonii, Citrus Marigold Telosma cordata, Pakalana Vine Thornless Honey Locust-Gleditsia triacanthos f. inermis Tilia cordata, Little Leaf Linden Trachelospermum jasminoides, Star Jasmine Ugni molinae, Chilean Guava Umbellularia californica California Bay Laurel (tree) Verbena x hybrida ‘Defiance,’ Defiance Verbena Viburnum carlesi 'Compactum' Viburnum Carlesii (clove scent) Viburnum, Korean Spice Viola Odora Weigela florida 'Variegata nana' Wild clover, Melilotus alba Wintersweet, Chimonanthus praecox Wisteria    

Juniperus virginiana sucks up a lot of water and creates massive allergen pollen bursts...so I personally wouldn't ever plant any of them. Their main benefit though would be that they are evergreen. I would suggest creating a mixed hedge sloping up in height away from the highway of "higher value" shrubs & trees like: <a href="http://www.gardeningknowhow.com/ornamental/trees/wax-myrtle/wax-myrtle-care.htm">Wax Myrtle</a> (as your primary hedge plant: <img src="http://www.sharptreefarm.com/Wax%20Myrtle%20-%2030%20Gal%20-%208-9%27.jpg"> & accent hedge with: Jujube (shrub) <img src="http://www.veggiegardeningtips.com/wp-content/uploads/2007/11/jujube-tree.jpg"> Black Chokeberry (shrub) <img src="http://imagehost.vendio.com/a/35088526/aview/TN281-2.JPG"> Black Beauty Morus nigra (tall mulberry shrub) Elderberry (large shrubs) <img src="http://www.uwgb.edu/biodiversity/herbarium/shrubs/samcan_aspect01.jpg"> Rusty Blackhaw (tall shrub) <img src="http://www.floridata.com/ref/V/images/vibu_ru1.jpg"><img src="http://www.beautifulwildlifegarden.com/wp-content/uploads/2011/03/DSCF5994-500x449.jpg"> Pomegranate (medium tree) <img src="https://idisciple.blob.core.windows.net/idm/Under-the-Pomegranate-Tree.png"> Vitex agnus-castus (large shrub & great pollinator attractor!) <img src="http://www.tree-land.com/images/Vitex_Mature.jpg"> <a href="http://www.lazyssfarm.com/Plants/Shrubs/Cl-It%20Shrubs/Cl-It%20Images/hamamelis_intermedia_primavera.htm">Hamamelis x intermedia 'Primavera'</a> (large shrub) <img src=http://www.lazyssfarm.com/Plants/Shrubs/Cl-It%20Shrubs/Cl-It%20Images/Hamamelis%20x%20intermedia%20%27Primavera%272.jpg"> Goldenball Leadtree (small tree) <img src="https://c2.staticflickr.com/4/3513/4572178690_102bfb25ab.jpg"> Eve's Necklace (small tree) <img src="https://aggie-horticulture.tamu.edu/ornamentals/natives/TREES/SOPHORAAFF1457.jpg"> Magnolia (Star, Southern, Saucer) trees <img src="http://www.jimwhitingnursery.com/images/feat-magnolia-royalstar-sm.jpg"> Redbud trees Mid-sized Oriental & taller American Persimmon trees <img src="http://www.burpee.com/images/product/prod003352/prod003352_alt3_lg.jpg"> Pecan trees Western Soapberry trees Oriental Raisin trees (Hovenia dulcis) <img src="http://plants.ces.ncsu.edu/static/plants/plant_images/hovenia_dulcis.jpg">