Fiberglass Tree Stakes by Ultrastake - Welcome Elevate your yield with UltraStake's Fiberglass and Steel Tree Stakes. Backed by a solid 20-year warranty, they ensure straighter, stronger, and healthier tree growth. No more rusting and fraying Elevate your yield with UltraStake's Fiberglass and Steel Tree Stakes. Backed by a solid 20-year warranty, they ensure straighter, stronger, and healthier tree growth. No more rusting and fraying — our Diamond Veil™, UV-protected fiberglass solution is trusted by America's top tree farms, nurseries, and landscapers for its durability and cost-effectiveness.