Grevillea Robusta / Silkoak Tree Genus - Grevillea Species - Robusta Common name - Silkoak Tree Other names - Haikv-keoko, Silver oak, Silky Oak, He-Oak, Okakilika, Spider Flower Pre-Treatment - Not-required Hardiness zones - 8 - 12 Height / spread - 50'-100' / 15 - 30(60) m / 15'-70' / 4 - 21(35) m Plant type - Tree Vegetation type - Evergreen Exposure - Full sun Growth rate - Fast Soil PH - Acidic, Neutral Soil type - Loam, sand, well drained Water requirements - Average Water, drought tolerant Landscape uses - Shade Trees, Tropical Leaf / Flower color - Dark Green, Silver / -- Plant growth rate - Fast Silkoak tree is native to the subtropical rainforest regions of eastern Australia. It produces airy, green, fern-like leaves with silvery undersides and masses of golden flowers that smother the tree in mid- to late spring. The tree partially defoliates as the curled flowers open up in obvious, showy clusters. Because of its beauty, the wood of this tree is harvested and used in the furniture-making industry. In the right conditions silkoak tree is a fast grower and excels in full sun and average, well-drained soil. It is very adaptable to dry soil conditions. It can be planted as a shade tree in climates similar to its native habitat, or as a semi-hardy short hedge. Although more challenging, it may also be grown in pots, under glass in conservatory or greenhouse collections where space allows. It is weak-wooded and not a good choice for areas prone to tropical storms. (info source: Learn2Grow.com) Extra seeds The seeds are hand-selected. You will never receive fewer seeds than stated. We include extra seeds always as possible ! Packing The seeds are securely packed in plastic labeled bags. You will get every seed with printed germination instruction included. The online extended PDF version will be accesible as well. You will receive: Seeds packed in plastic labeled bags Printed germination instructions Shipping We will ship from FLORIDA, UNITED STATES on the same or next business day after payment cleared by USPS First Class Mail with the printed the propagation and germination instructions. But you should check additional Internet resources for proper germination methods. Delivery time depends on your location (we always ship on the same or next business day after cleared payment): US buyers - 2-5 days non-US buyers - 7-30 days. Discounts Powered by HobbySeeds