For its Ace Reward Members, Ace Hardware offers the Jobe's 15-Count Tree Fertilizer Spikes in several varieties, for $4.99 as listed below. (Sign into your account and add it to your cart to see this price.) Opt for in-store pickup to avoid the $9.22 shipping charge. The varieties: Note: A 5-count bag of palm spikes is also available to Ace Reward Members for $4.99 with in-store pickup. That's a low by $8.