Its been 2 days since it first sprouted above the soil and it's grown about 3 inches. But the seed pod won't fall off! It's rock hard and I tried to pull it open but couldn't do it without harming the stem so I backed off. At the moment I can see the tips of the cotyledon leaves but it doesn't look like it's coming out anytime soon. Should I wait or get some tweezers and yank that thing off?